You pick a contract for its huge 24-hour volume, hit buy at the market, and the fill lands above the price you saw. Volume told you the market was busy; order book depth tells you what you can tradeYou pick a contract for its huge 24-hour volume, hit buy at the market, and the fill lands above the price you saw. Volume told you the market was busy; order book depth tells you what you can trade
Learn/Trading Guide/Trading Concepts/Is Volume the Same as Liquidity? Order Book Depth Explained, From 0.01% to 0.10% Bands
Is Volume the Same as Liquidity? Order Book Depth Explained, From 0.01% to 0.10% Bands
You pick a contract for its huge 24-hour volume, hit buy at the market, and the fill lands above the price you saw.
Volume told you the market was busy; order book depth tells you what you can trade right now, and at what price.
This guide covers depth, depth charts, and what the 0.01%, 0.05% and 0.10% bands in liquidity reports measure.
Key Takeaways
- Order book depth is the dollar value of buy and sell orders resting at each price level, the size a market order actually fills against.
- Trading volume counts trades that already happened, so a contract can post heavy volume on a thin book.
- Two books with equal total depth can fill the same order differently, depending on how much sits near the mid price.
- In MEXC's own comparison against four other major centralized exchanges, averaged over three days to October 28, 2026, MEXC had more depth within 0.01% of the mid price on 10 of 10 core assets and 18 of 20 stock futures.
- In TokenInsight's August 2026 report, MEXC's cumulative median depth of $0.52M within 0.01% of the mid price across the five sampled equity perpetuals ranked first of five exchanges, with second place at 0.05% and 0.10%.
- Reports use different band sets, so read the band before the rank, then compare your order size with the depth at the touch.
What is order book depth?
Order book depth is the total value of buy and sell orders resting in an exchange's order book at each price level around the current price, so it is the liquidity you can see right now, unlike trading volume, which records trades already matched.
The highest bid is the best bid, what a buyer will pay now; the lowest ask is the best ask, what a seller will take.
The gap between them is the bid-ask spread.
A market order takes that resting size level by level.
A deep book stacks size close to the price, so the order fills near the quote.
A thin book has gaps, so the order reaches further out, and that reach is slippage.
Is trading volume the same as liquidity?
Trading volume is not the same as liquidity: volume is the total value traded over a set period, while liquidity is the ability to trade now without moving the price, and order book depth is the part of liquidity you can see.
Rankings usually quote volume over the past 24 hours, fills that are already gone.
A contract can print heavy volume in a burst and have a thin book an hour later, because those orders are gone.
Another carries modest volume all day on a thick book.
The first fills badly, the second cleanly.
Measure | Trading volume | Order book depth |
What it counts | Trades already matched | Orders resting now |
Time frame | Past, often 24 hours | This moment |
What it tells you | How busy the market was | What your order fills against |
Where you see it | Market rankings | Order book and depth chart |
Why isn't total depth enough?
Total depth is not enough because two markets can hold the same dollar value of resting orders and still fill the same order at different prices: in Market A the orders cluster near the current price, in Market B they sit further out, so a market order in B walks through more levels.
It's not just how deep.
It's where.
Near-price depth, the size inside a narrow band around the mid price, is the first thing to check.
What do the 0.01%, 0.05% and 0.10% depth bands measure?
A depth band measures the cumulative value of resting orders within a set distance of the mid price on both sides of the book, so on a contract at $100.00 the 0.01% band counts every order from $99.99 to $100.01.
Band | Range at $100.00 | What it shows | Used in TokenInsight reports |
0.01% | $99.99 to $100.01 | How a small order fills | July, August and September 2026 |
0.03% | $99.97 to $100.03 | Mid-sized orders | July and September 2026 |
0.05% | $99.95 to $100.05 | Larger orders | July and August 2026 |
0.10% | $99.90 to $100.10 | What a large order eats through | May and August 2026 |
Different order sizes and assets call for different bands, so 0.01% does not matter most for everyone.
Venues can rank differently by band, because one packs orders at the touch while another spreads size further out, so read the band before the rank.
Does order book depth stay the same all day?
Order book depth does not stay the same all day, because market makers and other traders add and pull orders as the session, volatility and news change, so one snapshot shows the execution quality of that moment only.
MEXC's trading-hours guide for TradFi futures rates the regular US session high liquidity, pre-market, after-hours and overnight medium, and closed-market hours low.
The guide to weekend and off-hours stock futures liquidity shows what that does to a Saturday order.
How deep is MEXC's book near the price?
MEXC's book near the price was deeper than the best of four other major centralized exchanges on 10 of 10 core assets and 18 of 20 stock futures within 0.01% of the mid price in MEXC's October 28, 2026 comparison, and first at the narrowest band in TokenInsight's August and September 2026 reports.
In MEXC's own comparison of order-book snapshots against four other major centralized exchanges, averaged over three days to October 28, 2026, simulated slippage is the average of a buy and a sell against the snapshot mid-price, excluding fees and funding; each MEXC figure is set against the best of the four on that asset and size, and every figure is one side, so a round trip is twice it.
Median multiples over the best other book in that comparison were 5.62x across the ten core assets and 4.65x across the twenty stock futures, and the slippage tables by order size sit in the hub for MEXC's full depth and slippage data.
BTC held $16.59 million against $4.00 million (4.15x), silver $4.79 million against $0.44 million (10.89x), and SPY $6.94 million against $0.42 million (16.58x).
In TokenInsight's August 2026 report (five exchanges, weekdays from July 29 to August 6, 2026), MEXC posted a cumulative median depth of $0.52M within 0.01% of the mid price across the five sampled equity perpetuals, first in the sample, and second at 0.05% and 0.10%.
In TokenInsight's September 2026 report, which sampled nine exchanges, MEXC's combined BTC and ETH futures depth within 0.03% was $21.03M, first in the sample, and its spot depth within 0.03% second.
The July 2026 report (nine exchanges, June 15 to July 14, 2026) placed MEXC first within 0.03% and third within 0.05%, as MEXC's August 4, 2026 release summarizes.
The May 2026 report (eight exchanges, April 1 to May 12, 2026) placed MEXC third for precious metals futures depth, as MEXC's June 1, 2026 release notes.
TokenInsight report | Market | Band | MEXC depth | Rank |
August 2026 (5 exchanges) | Five equity perpetuals, cumulative median | 0.01% | $0.52M | 1st |
August 2026 | Five equity perpetuals, cumulative median | 0.05% | $2.81M | 2nd |
August 2026 | Five equity perpetuals, cumulative median | 0.10% | $5.99M | 2nd |
September 2026 (9 exchanges) | BTC and ETH futures | 0.03% | $21.03M | 1st |
September 2026 | BTC and ETH spot | 0.01% | About $1.35M | Tied 1st |
September 2026 | BTC and ETH spot | 0.03% | $3.58M | 2nd |
July 2026 (9 exchanges) | BTC and ETH futures | 0.03% | $15.71M | 1st |
July 2026 | BTC and ETH futures | 0.05% | $20.83M | 3rd |
May 2026 (8 exchanges) | Precious metals futures | 0.10% | $4.3M | 3rd |
May 2026 | Precious metals futures | 0.30% | $8.9M | 3rd |
BTC at $500,000 is the exception in that comparison: MEXC's simulated one-way slippage cost was $6.79 against $6.54 for the best other book, about $0.24 more.
Near-price depth did not mean the lowest simulated slippage at every size, and one snapshot is not a forecast of every fill.
Why a $100,000 order fills worse than $10,000 is covered in the guide to how slippage grows with order size.
How do you read a depth chart on MEXC?
A depth chart on MEXC draws the order book as two cumulative curves, price along the horizontal axis and resting size up the vertical axis: the green curve on the left is bids, the red curve on the right is asks, and the point where they meet is the current market price.
Find the meeting point first, not the biggest wall.
Then look at how tall the curves get inside a thin sliver on either side of it; that sliver is the 0.01% band.
A curve that climbs steeply right away means size stacked close to the price; one that stays flat and then jumps means gaps a market order skips.
What do buy walls and sell walls mean?
A wall is a vertical jump in the curve, one large order or a cluster at a single price.
It can be pulled before the price gets there, so read the chart as the book right now, not a forecast.
A bigger green area means more resting bids than asks near the price, not a direction call.
How do you use depth before you place an order?
Before you place an order, compare its size with the depth inside the 0.01% band around the current price: if the order is smaller than that near-price depth, a market order should fill close to the quote, and if it is larger, use a limit order, split it, or wait for a deeper book.
Your leverage tier caps that size too, as the guide to stock futures leverage tiers and position limits explains.
A limit order rests in the book at your price and adds depth instead of eating it, but it may not fill.
Timing matters: MEXC's stock futures guide says slippage may increase during its Low-Liquidity Period and suggests smaller or split orders.
Depth is the first line of your cost, and slippage at your order size is the second.
Fees and funding then complete the total cost of a futures trade.
FAQ
What is market depth?
Market depth is the total value of buy and sell orders resting at each price level around the current price, another name for order book depth.
Is high volume the same as deep liquidity?
No, volume counts trades that already happened while depth counts orders waiting now, so a market can have high volume and still fill badly.
What is near-price depth?
Near-price depth is the value of resting orders within a narrow band such as 0.01% of the mid price, the size a market order consumes first.
What does 0.01% depth mean?
0.01% depth counts orders within 0.01% above and below the mid price, so a contract at $100 covers $99.99 to $100.01.
What is a depth chart?
A depth chart is the order book drawn as two cumulative curves, green bids left and red asks right, meeting at the current price.
How do I check depth on MEXC?
Open the contract's trading page, find the depth chart beside the order book, and compare the size near the mid price with your order.
Why does depth matter for large orders?
A large market order fills through several price levels at once, so deeper wide-band depth keeps its average fill closer to the quote.
Does deeper liquidity always mean lower slippage?
No, a deeper near-price book does not mean the lowest slippage at every order size, as BTC at $500,000 showed in MEXC's October 28, 2026 comparison.
Is exchange depth the same as on-chain liquidity?
No, exchange depth is resting orders in a centralized order book, while on-chain liquidity sits in decentralized pools, which the guide to on-chain liquidity trends covers.
Conclusion
No, volume is not liquidity, and the difference shows up in your fill price.
Volume says the market was busy; depth says whether the book can take your order near the price you see.
For the wider case, read why choose MEXC futures, then open a stock future and watch its depth chart before you trade.
Disclaimer: This material does not constitute advice on investments, taxes, legal matters, finance, accounting, consulting, or any other related services, nor is it a recommendation to buy, sell, or hold any assets.
MEXC Learn provides information for reference only and does not constitute investment advice.
Please make sure you fully understand the risks involved and invest cautiously.
All investment decisions and outcomes are the sole responsibility of the user.
Trading crypto assets is high-risk; prices can be highly volatile and you may lose everything you put in. No security measure removes all risk, and MEXC does not promise principal protection or absolute security. This article is not investment advice.
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This article is provided by MEXC Learn Team for informational purposes only and does not constitute financial or investment advice. Cryptocurrency markets involve significant risk. Please conduct independent research or consult a qualified professional before making any investment decisions. The views expressed do not necessarily represent those of MEXC or its affiliates.
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