ASIC Miner Efficiency Explained: How J/TH Affects Your Mining Profitability

Last updated: March 2026 | Reading time: ~18 minutes

Not a tech person? That's fine. This article is written so that anyone � from a first-time miner to someone just evaluating whether Bitcoin mining is worth it � can understand exactly what ASIC miner efficiency means, why J/TH matters more than almost any other number, and how to use these metrics to make smarter decisions with real money.

What Is ASIC Miner Efficiency? The 60-Second Version

The efficiency of a miner determines whether your Bitcoin mining operation makes money or loses it. The single metric that matters most is J/TH � joules per terahash. This guide explains everything about ASIC mining efficiency that spec sheets won't tell you.

J/TH stands for Joules per Terahash.

• A joule is a unit of energy � essentially a tiny sip of electricity.
• A terahash is one trillion hashing operations � the mathematical "guesses" your ASIC miner makes every second trying to win the next Bitcoin block reward.

So J/TH tells you: how much electricity does your mining hardware consume for every trillion guesses it makes?

Lower J/TH = less electricity per unit of work = better ASIC efficiency = more profit.

Think of it like fuel economy in a car. A car that gets 50 miles per gallon is more efficient than one that gets 15 mpg. If you're driving the same distance, the efficient car costs you less. Bitcoin mining efficiency works the same way � the "distance" is the hashing work, and J/TH is your fuel economy rating.

A mining rig from 2016 might have had a J/TH rating of 100+. Today's most efficient ASIC miners operate around 13�17 J/TH. That's roughly a 7� improvement in ASIC mining efficiency over eight years � meaning you do the same work for one-seventh the electricity cost.

Now here's what the other articles won't tell you about maximizing your ASIC miner efficiency.

What the Spec Sheet Won't Tell You: 7 Efficiency Truths

1: Your ASIC Miner's Real Efficiency Is Not What the Box Says

The Gap Between "Rated" and "Actual" ASIC Mining Efficiency

When a manufacturer like Bitmain or MicroBT publishes a J/TH spec � say, 15 J/TH for the Antminer S21 Pro � that number was measured in a perfect lab environment: ideal temperature, stable voltage, clean power, and brand-new mining hardware.

Your mining setup is not a lab.

In the real world, actual power consumption typically runs 3 to 10% higher than the rated spec. Here's why your miner efficiency suffers:

Real-World Factor

What It Does to Your ASIC Efficiency

High ambient temperature (30�C+)

Fans spin faster, drawing more power. Chips throttle to protect themselves, dropping hashrate.

Power supply (PSU) inefficiency

Your PSU converts wall power to miner power � this conversion wastes 6�10% as heat. That wasted energy still shows on your electricity bill.

Voltage fluctuations

Unstable power causes the miner to draw more current to compensate.

Dust and restricted airflow

Chips run hotter, efficiency drops, thermal protection kicks in.

Altitude

Thinner air = less effective cooling. ASIC miners in high-altitude locations run consistently hotter.

How to Calculate Your Effective ASIC Miner Efficiency

Here is a simple formula every miner should use to measure true Bitcoin mining efficiency:

Effective J/TH = Actual Watts from the Wall � Actual Terahashes per Second

Step-by-step example:

Let's say you bought a miner rated at 15 J/TH producing 335 TH/s at 5,025 watts.

1. Plug in a smart power meter (a cheap one costs ~$15�25 online).
2. Measure actual wall watts. Your reading: 5,380 watts (not 5,025 � the PSU and heat losses account for the extra ~355W).
3. Check your miner's dashboard for actual hashrate. It reads 318 TH/s (not 335 � it's a warm day and the chips are throttling slightly).
4. Calculate: 5,380 � 318 = 16.9 J/TH

Your "15 J/TH" miner is actually running at nearly 17 J/TH in real conditions. That's a 13% gap in efficiency � and at scale, it significantly changes your profitability math.

Why this matters: If you built your ROI model on 15 J/TH and you're actually running at 17 J/TH, you're spending ~13% more on electricity than you planned. On a 100 TH/s operation, that's thousands of dollars per year in unaccounted costs.

? Quick tip: Always measure actual wall power with a meter for at least 48 hours before locking in your profitability projections. Real-world ASIC mining efficiency always differs from the spec sheet.

2: Your Mining Hardware Gets Less Efficient Every Month � Here's the Degradation Curve

This is one of the most financially important things about ASIC mining efficiency that almost nobody talks about.

Hardware Degrades. Bitcoin Mining Efficiency Degrades With It.

A new miner runs at peak ASIC efficiency. But over time � even with good maintenance � several things happen:

• Thermal paste dries out. The paste between chips and heatsinks transfers heat. When it hardens and cracks (typically after 12�18 months), chips run hotter, throttle more frequently, and draw more power for less output.
• Fan bearings wear down. Fans move slightly less air over time. Less airflow = more heat = declining ASIC miner efficiency.
• Dust accumulation. Even in clean environments, dust slowly restricts airflow through heatsinks and chip surfaces.
• Chip-level degradation. At the microscopic level, prolonged heat cycling causes tiny structural changes in semiconductors. This is gradual, but measurable after 2�3 years.

What Does the ASIC Efficiency Degradation Curve Look Like?

Here's a realistic efficiency timeline for a well-maintained mining rig versus a neglected one:

Age

Well-Maintained (% of rated ASIC efficiency)

Neglected (% of rated ASIC efficiency)

0�6 months

~97�100%

~97�100%

6�12 months

~94�97%

~88�93%

12�18 months

~91�95%

~80�87%

18�24 months

~88�93%

~72�80%

24�36 months

~84�90%

~60�72%

Translation: A neglected miner that was rated at 15 J/TH could effectively be running at the equivalent of 20�25 J/TH after two years. At that point, it may be cheaper to replace the mining hardware than keep running it.

The Maintenance Schedule That Preserves Your ASIC Mining Efficiency

Every 3 months:

• Blow out dust with compressed air (outside, not indoors)
• Check fan RPM readings on the dashboard � a fan running slower than spec is a warning sign
• Inspect power cables for heat damage or loose connections

Every 12�18 months:

• Replace thermal paste on hashing boards (this alone can recover 2�4% ASIC efficiency)
• Replace fans if RPM has dropped more than 10% from spec
• Clean and inspect PSU filters

At the 24-month mark:

• Do a full ASIC efficiency audit using the Effective J/TH formula above
• Compare your miner's actual performance against new hardware options
• If your effective J/TH has degraded more than 20%, run the numbers on replacement vs. continued operation

? Real-world insight: Many miners who upgrade hardware are actually running machines that could be partially recovered with a $30 thermal paste job and a $20 fan replacement. Know which situation you're in before buying new mining hardware.

3: The Decision Matrix Nobody Shows You � $/TH vs. J/TH

Here's a trap many miners fall into: they optimize for one number and ignore the other, killing their overall ASIC mining efficiency.

Two numbers determine your hardware economics:

• J/TH � your ongoing electricity cost per unit of work (operating cost)
• $/TH � how much you paid per terahash of capacity (capital cost)

These two numbers interact. The "most efficient ASIC miner" on paper is not always the most profitable mining hardware for your situation.

The Four Miner Personas

Think of every ASIC on the market as falling into one of four categories:

Quadrant 1 � High $/TH + Low J/TH (The Premium Bet) Example: Latest-gen flagship miners at launch pricing

You pay top dollar for maximum ASIC miner efficiency. This makes sense if: (a) you have high electricity costs and every J/TH saved goes straight to profit, or (b) you expect BTC price appreciation that will justify the premium capital outlay.

Quadrant 2 � Low $/TH + Low J/TH (The Sweet Spot) Example: Last-gen flagships bought secondhand 12�18 months after launch

Efficient mining hardware at a discount. These opportunities appear when the next-gen machines ship and owners upgrade. The catch: apply the degradation curve from Part 2 � this hardware is already past its peak ASIC efficiency.

Quadrant 3 � Low $/TH + High J/TH (The Value Gamble) Example: Older-gen miners bought cheap

Low upfront cost, but you'll bleed electricity every month. This can work only if your electricity is extremely cheap (under $0.04�0.05/kWh). At average rates, the ongoing cost eats your savings within months.

Quadrant 4 � High $/TH + High J/TH (The Trap) Example: Overpriced second-tier mining hardware

Avoid entirely. You're paying premium capital costs for inefficient operations. There is no scenario where this delivers good ASIC mining efficiency.

Real Hardware Examples Mapped to Each Quadrant (2026)

Miner

Approx $/TH

J/TH

Quadrant

Best For

Antminer S21 XP (new)

~$18�22/TH

~13 J/TH

Q1

Industrial ops, high-cost power

Antminer S21 Pro (secondhand)

~$10�14/TH

~15 J/TH

Q2

Best overall value play

WhatsMiner M53S++ (secondhand)

~$8�11/TH

~17 J/TH

Q2�Q3

Works at $0.05/kWh or below

Antminer S19k Pro (used)

~$5�7/TH

~23 J/TH

Q3

Only viable below $0.04/kWh

Any miner >40 J/TH

varies

40+ J/TH

Q4

Avoid unless power is near-free

? The key insight: Your electricity rate determines which quadrant you should be shopping in. Before you look at any miner spec sheet, know your $/kWh. That single number changes your miner's efficiency strategy entirely.

4: Your Bitcoin Miner's Shutdown Price

Every mining rig has a price � a specific Bitcoin price � below which it loses money every single day it stays on. Most people have a vague sense of this. You need the exact number to protect your ASIC mining profitability.

Why This Matters

Bitcoin's price is volatile. Difficulty adjusts every two weeks. When conditions get tough, miners with poor ASIC efficiency get "washed out" � they literally lose money running, so they shut off. This actually helps the remaining miners (less competition = more reward per miner). Knowing your shutdown threshold lets you:

• Decide whether to hedge or hold BTC
• Know when to pause mining and preserve electricity costs
• Plan for bear market scenarios realistically

The Shutdown Price Formula (in Simple Terms)

Step 1 � Calculate your daily electricity cost Daily Electricity Cost ()=(MinerWattage�1,000)�24hours�ElectricityRate( /kWh) Example: A 3,500W miner at $0.07/kWh ? (3,500 � 1,000) � 24 � $0.07 = $5.88/day

Step 2 � Calculate your daily Bitcoin earnings (in BTC)

Use a mining calculator (like the EndlessMining.com calculator or WhatToMine) to get your daily BTC earnings based on your hashrate and current network difficulty. In this example: 0.000085 BTC/day.

Step 3 � Calculate your shutdown price Shutdown Price ($/BTC) = Daily Electricity Cost � Daily BTC Earned ? $5.88 � 0.000085 = $69,176/BTC

This means: if the price of Bitcoin drops below ~$69,200, your miner is losing money every day it runs.

Step 4 � Stress test with higher difficulty

Recalculate with difficulty 20% higher (difficulty tends to grow over time as more miners join the network). Your daily BTC earnings drop to roughly 0.0000708 BTC. $5.88 � 0.0000708 = $83,051/BTC

Suddenly your shutdown price is over $83,000. This is why difficulty growth is a critical variable � it silently erodes ASIC mining profitability even when BTC price stays flat.

The Shutdown Price Cheat Sheet

Here's how J/TH and miner efficiency directly impact shutdown price across different electricity rates:

J/TH Rating

Electricity Rate

Approximate BTC Shutdown Price*

13 J/TH

$0.05/kWh

~$38,000

13 J/TH

$0.08/kWh

~$61,000

15 J/TH

$0.05/kWh

~$44,000

15 J/TH

$0.08/kWh

~$70,000

20 J/TH

$0.05/kWh

~$59,000

20 J/TH

$0.08/kWh

~$94,000

30 J/TH

$0.05/kWh

~$88,000

30 J/TH

$0.08/kWh

~$141,000

Approximate figures based on mid-2026 network difficulty.

A miner running at 30 J/TH on $0.08/kWh electricity needs Bitcoin to be above $141,000 just to break even on power costs. Meanwhile, a 13 J/TH miner on $0.05/kWh power stays profitable well into bear market territory � demonstrating why ASIC miner efficiency matters so much.

? Action step: Calculate your shutdown price right now, before the next difficulty adjustment. Set a calendar reminder to recalculate it every two weeks.

5: Firmware � The Free ASIC Efficiency Upgrade Most Miners Ignore

Here's something that surprises many people: you can improve the effective J/TH and overall ASIC mining efficiency of your existing mining hardware without buying new equipment. The tool is custom firmware.

What Is Firmware and Why Does It Matter for ASIC Efficiency?

Think of your miner's firmware as its operating system � the software that tells the chips how hard to work and at what voltage. The firmware that ships from the factory is designed to hit peak hashrate. It is not optimized for efficiency or cost.

Third-party firmware options like Braiins OS+ and LuxOS allow you to:

• Undervolt the chips � run them at slightly lower voltage, which uses less power, with a modest reduction in hashrate
• Autotuning � the firmware tests thousands of voltage/frequency combinations chip-by-chip and finds the sweet spot for each individual chip (since no two chips are identical)
• Power modes � run the miner at 70%, 80%, or 90% of rated power for a disproportionately smaller drop in hashrate

The Underclocking Trade-Off in Real Numbers

Here's a real-world example using an Antminer S21 Pro to improve Bitcoin mining efficiency:

Mode

Power Consumption

Hashrate

J/TH

Daily Electricity Cost at $0.07/kWh

Stock (100%)

3,510W

234 TH/s

15.0 J/TH

$5.90

90% Power Mode

3,100W

215 TH/s

14.4 J/TH

$5.21

80% Power Mode

2,700W

192 TH/s

14.1 J/TH

$4.54

70% Power Mode

2,250W

163 TH/s

13.8 J/TH

$3.78

Notice what's happening: reducing power by 30% only reduces hashrate by about 30% � but your J/TH improves because the chips achieve better ASIC efficiency at lower power. You earn slightly less, but you spend meaningfully less on electricity. Depending on your electricity rate and BTC price, this can actually improve your net profit margin.

When does underclocking make sense for ASIC mining efficiency?

• When BTC price is low or uncertain (preserve margin by cutting costs)
• When your electricity rate is high (amplify the savings per watt)
• When you're approaching the shutdown price threshold (extend your viable operating range)
• During peak energy demand hours when your utility charges more

When should you run at full power?

• When BTC price is high and you want to maximize revenue
• When your electricity rate is very low (below $0.04/kWh)
• During periods of lower network difficulty (each TH earns more � don't give any up)

? Important: Braiins OS+ and LuxOS typically charge a 2-2.8% dev fee on hashrate. Factor this into your ASIC efficiency calculations � it's the equivalent of adding roughly 0.3 J/TH to your effective cost.

6: Where You Mine Matters as Much as Your Mining Hardware, The Location Factor

This is the concept of geographic J/TH arbitrage, and it's one of the most powerful � and most overlooked � ideas in optimizing ASIC miner efficiency.

The Same Mining Rig, Four Different Realities

The hardware doesn't change. The electricity rate does. And electricity rate can completely flip which mining hardware "wins" on efficiency.

Daily profit per miner (assuming BTC = $85,000, mid-2026 difficulty):

Miner

J/TH

$0.03/kWh

$0.05/kWh

$0.07/kWh

$0.10/kWh

Antminer S21 XP

13 J/TH

$14.20/day ?

$11.40/day ?

$8.60/day ?

$4.40/day ?

Antminer S21 Pro

15 J/TH

$13.50/day ?

$10.10/day ?

$6.70/day ?

$1.60/day ??

Antminer S19k Pro

23 J/TH

$11.80/day ?

$7.00/day ?

$2.20/day ??

-$4.60/day ?

Approximate figures for illustration.

At $0.10/kWh electricity � common in many parts of Europe, North America, and Africa � the S19k Pro loses money every day, while the S21 XP still produces a healthy profit. The miner's J/TH rating and overall ASIC efficiency are what separate a business from a money pit.

But flip to $0.03/kWh � available near hydroelectric dams in places like Ethiopia, Paraguay, or parts of the US Pacific Northwest � and even the older, less efficient S19k Pro turns a solid daily profit. Geography transforms the ASIC mining efficiency hierarchy entirely.

Where the World's Best Mining Electricity Exists

Cheap, stable power for maximizing miner efficiency typically comes from:

• Stranded renewable energy � hydroelectric or geothermal sources in remote areas where power can't be sold to the grid efficiently (Iceland, Ethiopia, El Salvador, parts of Canada and the US Northwest)
• Flared natural gas � oil fields that burn off excess gas as waste; some mining operations convert this gas to electricity on-site, often at $0.02�0.04/kWh equivalent cost
• Industrial power contracts � large-scale operations that negotiate directly with utilities for bulk rates, often $0.03�0.05/kWh
• Behind-the-meter solar � if you generate your own solar power, your marginal electricity cost can be near zero during peak generation hours

? For home and small-scale miners: Your electricity rate is the single most important number to negotiate or engineer. Even moving from $0.10/kWh to $0.07/kWh � by switching utility plans, adding solar, or using time-of-use rates � can be worth more to your bottom line than buying new, more efficient mining hardware.

7: Why ASIC Mining Efficiency Will Keep Improving � But Has a Physical Limit

You don't need to be an engineer to understand this. But knowing where we are on the efficiency curve helps you decide whether to buy mining hardware now or wait for the next generation.

The Chip Shrink Story

Every few years, chip manufacturers figure out how to make the transistors inside a chip smaller. This is measured in nanometers (nm) � the smaller the number, the more transistors fit on the same chip, and the less power each one needs, improving efficiency.

Here's how ASIC mining chips have progressed:

Era

Node Size

Typical J/TH

ASIC Efficiency Improvement

2016�2017

28nm

80�100 J/TH

Baseline

2018�2019

16nm

45�65 J/TH

~2� better

2020�2021

7nm

28�38 J/TH

~2� better

2022�2023

5nm

17�24 J/TH

~2� better

2024�2025

4�3nm

13�17 J/TH

~1.5� better

Each generation roughly halved the energy per computation. That's why the ASIC efficiency gains have been so dramatic over the past decade.

But We're Approaching the Physical Limit of ASIC Miner Efficiency

Here's the uncomfortable truth: we are running out of room to shrink chips.

At 3nm, transistors are only about 15�20 atoms wide. At that scale, quantum effects start causing electrons to "tunnel" through barriers they're not supposed to cross � causing errors and requiring more energy to overcome. Going to 2nm or 1nm will yield improvements, but the gains get smaller and more expensive with each generation.

What this means practically for Bitcoin mining efficiency:

• The era of rapid J/TH improvement is slowing down. The jump from 100 J/TH to 50 J/TH was fast. The jump from 13 J/TH to 8 J/TH will take much longer and cost much more in R&D.
• Today's flagship mining hardware will hold its value longer than previous generations, because the next-gen ASIC efficiency improvement will be smaller.
• The competitive advantage will shift from raw ASIC efficiency to operating costs, scale, and energy sourcing.

For the individual miner: if you're holding off on buying mining hardware because you're waiting for a big efficiency jump � you may be waiting a while. The low-hanging fruit for efficiency is gone.

Finding the Most Efficient ASIC Miner for Your Situation

What is the most efficient ASIC miner for your specific situation? The answer depends on your electricity rate, budget, and risk tolerance � not just the J/TH rating on the spec sheet.

Most Efficient ASIC Miners by Electricity Rate (2026)

Electricity Rate

Most Efficient ASIC Miner Strategy

Recommended J/TH

Below $0.04/kWh

Flexibility � older mining hardware can still work profitably

Under 30 J/TH acceptable

$0.04�0.06/kWh

Stick to efficient ASIC miners rated at 20 J/TH or better

17�20 J/TH

$0.06�0.09/kWh

You need 15�17 J/TH or better for meaningful margins

15�17 J/TH

Above $0.09/kWh

Only the most efficient current-gen ASIC miners make sense

13�15 J/TH

Most Efficient ASIC Miners Available in 2026

For maximum ASIC miner efficiency (premium option):

• Antminer S21 XP � ~13 J/TH
• Best for: High electricity rates, long-term operations
• Trade-off: Highest upfront cost per TH

For balanced ASIC efficiency and value:

• Antminer S21 Pro � ~15 J/TH
• WhatsMiner M60S � ~16�17 J/TH
• Best for: Most home and small commercial miners
• Trade-off: Good efficiency at more accessible prices

For budget-conscious miners with cheap power:

• Antminer S19k Pro � ~23 J/TH (when underclocked with custom firmware)
• WhatsMiner M50 series � ~24�26 J/TH
• Best for: Locations with electricity under $0.04/kWh
• Trade-off: Higher power consumption, lower capital cost

? Remember: The "most efficient ASIC miner" on paper isn't the most profitable for everyone. A 13 J/TH machine at $20/TH is worse than a 17 J/TH machine at $8/TH if your electricity is cheap and you're budget-constrained.

Putting It All Together: Your ASIC Efficiency Action Plan

Here's a practical decision framework based on everything above about maximizing your miner efficiency:

1. First, Know Your Electricity Rate ($/kWh)

This is non-negotiable. Check your utility bill, or ask your hosting provider. Every other decision about ASIC mining efficiency flows from this number.

• Below $0.04/kWh: You have flexibility � older mining hardware can still work.
• $0.04�0.06/kWh: Stick to ASIC miners rated at 20 J/TH or better.
• $0.06�0.09/kWh: You need 15�17 J/TH or better to have meaningful margins.
• Above $0.09/kWh: Only the most efficient current-gen ASIC miners makes sense � and even then, margins are thin. Consider whether hosting in a cheaper-power location makes more sense than running at home.

2. Calculate Effective J/TH, Not Rated J/TH

Before finalizing any purchase, ask for or measure real-world power consumption. Add 5�8% to the rated wattage as a conservative estimate if you can't test first. True efficiency is always measured at the wall, not on the spec sheet.

3. Know Your Shutdown Price Before You Buy

Use the formula in Part 4. Know what Bitcoin price makes your mining rig unprofitable. If that number is uncomfortably close to current prices, reconsider the hardware choice.

4. Plan for Degradation

If you're building a 3-year profitability model, don't use year-one ASIC efficiency numbers for years 2 and 3. Apply the degradation curve from Part 2. Budget for at least one maintenance cycle (thermal paste + fans) per year to preserve mining hardware efficiency.

5. Consider Firmware Before Hardware

If you already own miners, try undervolting with Braiins OS+ or LuxOS before buying new mining hardware. You may recover meaningful ASIC efficiency at very low cost. Calculate whether the efficiency gain justifies the 2% dev fee.

6. Revisit Your Shutdown Price Every Two Weeks

Bitcoin difficulty adjusts every ~2 weeks. Your shutdown price changes with it. Set a reminder. It takes five minutes and can save you real money when ASIC mining profitability shifts.

Frequently Asked Questions About ASIC Miner Efficiency

What is the most efficient ASIC miner available today?

The Antminer S21 XP currently leads with approximately 13 J/TH, making it the most efficient Bitcoin mining hardware commercially available in 2026. However, the "best" efficiency for your situation depends on your electricity rate and budget. The Antminer S23 Hydro, recently announced by Bitmain, will overtake the S21 XP as it promises an efficiency of 9.5 J/TH.

How do you calculate ASIC miner efficiency?

A miner's efficiency is calculated by dividing power consumption (in watts) by hashrate (in terahashes per second). The result is expressed as J/TH (joules per terahash). Lower numbers indicate better Bitcoin mining efficiency.

Why does ASIC efficiency degrade over time?

ASIC mining efficiency degrades due to thermal paste drying out, fan wear, dust accumulation, and microscopic chip degradation from heat cycling. Without maintenance, a miner rated at 15 J/TH could effectively operate at 20�25 J/TH after two years.

Can you improve ASIC miner efficiency without buying new hardware?

Yes. Custom firmware like Braiins OS+ or LuxOS can improve ASIC efficiency by 5�15% through undervolting and autotuning. Regular maintenance (thermal paste replacement, cleaning) can also recover lost efficiency.

What J/TH rating do I need for profitable Bitcoin mining?

It depends on your electricity rate. At $0.05/kWh, you need under 30 J/TH to profit. At $0.08/kWh, you need under 20 J/TH. At $0.10/kWh, only the most efficient ASIC miners under 16 J/TH remain viable.

The Bottom Line

ASIC miner efficiency, measured in J/TH, is the heartbeat of Bitcoin mining economics. But the number on the spec sheet is just the starting point. The miners who consistently profit over multi-year horizons are the ones who understand:

• Their effective ASIC efficiency, not their rated J/TH
• How Bitcoin mining efficiency degrades over time and what to do about it
• How to use the $/TH � J/TH matrix to pick the right mining hardware for their situation
• Their exact shutdown price � and how it shifts with every difficulty adjustment
• How firmware optimization can extract more efficiency from existing mining rigs
• How electricity geography can matter more than the mining hardware itself
• That chip efficiency improvements are slowing down, making today's ASIC miner choices more durable than they used to be

Master these concepts, and you'll make better mining decisions than the vast majority of people who just look at a spec sheet and a Bitcoin price chart.

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