The Difference Between Trading Volume and Liquidity

Liquidity is about how much the price will change when you buy or sell a certain amount of an asset. In a liquid market, because there are sufficient counter-orders or pool liquidity, transactions can occur with smaller price differences. Daily trading volume, the bid-ask spread, and order book depth help us understand this situation; however, the three are not the same measurement.

What does trading volume count?

Volume is the total sum of transactions that occurred over a specific period. An exchange might report $10 million in trading volume over the last 24 hours. This figure does not indicate that there are $10 million worth of buy orders currently waiting in the market. When the same asset changes hands repeatedly throughout the day, it contributes to volume each time. For this reason, volume cannot be read as the amount of new money entering the market.

Distinguish also between the units in which volume is given. A volume of 100 BTC and a volume of 100 million TL are different representations. Global volume collected from all exchanges is not the same as the volume in the BTC/TRY market on the platform you are using. Spot transactions and futures transactions should also be kept separate. High derivative volume does not mean that an equivalent amount of physical BTC has been delivered.

Spread: The difference between buy and sell

The difference between the highest buy price (bid) and the lowest sell price (ask) in the order book is called the spread. For example, if the highest bid is 99 TL and the lowest ask is 101 TL, the difference is 2 TL. Since the mid-price is 100 TL, the spread relative to the mid-price is 2 percent. This indicates that if you try to buy with a market order and sell immediately before prices change, you will encounter a difference beyond just the commission.

The last transaction price shown in large letters on the screen might be 100 TL; yet, there may not be a buyer willing to purchase at 100 TL right now. For selling, you look at the buy side; for buying, you look at the sell side. Real-time quote screens may include this difference within a single price. The phrase “zero commission” does not prove that the total cost is zero; the difference between the quote and the comparable market price is also important.

Depth: How many orders are there at specific prices?

Depth shows the quantities waiting at different price levels in the order book. If there is only a small amount available at the best price, a large order will spill over into the next levels. Thus, part of the transaction may be bought more expensively or sold more cheaply. A depth chart visualizes the accumulated order quantity as the price moves away; it is not a guarantee of future demand.

Imagine a hypothetical sell side with 10 tokens at 100 TL, 20 tokens at 101 TL, and 50 tokens at 103 TL. A market buy of 40 tokens uses the 30 tokens from the first two levels and 10 tokens from the final level. A total of 4,050 TL is paid; the average price becomes 101.25 TL. A calculation of 4,000 TL based on the first seen price of 100 TL remains incomplete because it does not account for the quantities in the order book.

Do high volume, narrow spread, and depth occur together?

In most active markets, these metrics may support each other; however, they do not always move in the same direction. Even if high volume has occurred throughout the day, orders can be withdrawn at a specific moment and the spread can widen. During an important news event, a platform outage, or a sudden price movement, the past 24-hour volume does not adequately describe the transaction capability at that moment.

The reliability of the reported volume is also important. If the same parties generate volume through transactions with no economic purpose (wash trading) or if a data provider misclassifies certain markets, the comparison can be distorted. Instead of a single number, different sources, the actual order book, and the obtained transaction quote can be examined together. Orders seen in the depth can also be canceled before you trade; a screenshot is not a guarantee.

How does liquidity appear in DEX pools?

Automated market makers use pool balances and pricing rules instead of a traditional order book. Since a trade changes the ratio in the pool, it creates its own price impact. In concentrated liquidity, even if the total value locked is high, active liquidity around the current price may be low. Therefore, simply knowing the total dollar value of the pool is not enough to calculate the transaction outcome.

The same token pair may have separate pools at different fee tiers or on different networks. An interface might split a transaction across multiple pools. For the user, a meaningful comparison is the expected net output and total fees for the same input amount. Do not assume the largest pool will provide the best result for every amount; the route and price range can change the result.

Which information should you use for your own trade?

First, determine the trading pair and the amount. A global price list gives a general overview; for the actual trade, examine the buy or sell side on your platform. Then, calculate the average execution price, commission, and any network or withdrawal fees for the same amount. When comparing different platforms, comparing the last price on one with a quote including all fees on the other does not give a fair result.

A limit order can set the price limit you are willing to accept, but it does not guarantee that the trade will be completed. Breaking a large amount into pieces can change the instantaneous impact of a single order; conversely, price changes over time and recurring fees will emerge. These tools do not eliminate a lack of liquidity. The goal is to understand what outcome you are accepting before pressing the trade button.

Why can liquidity disappear when the market seems calm?

Participants providing liquidity can withdraw their orders or widen the price range when risk increases. An exchange stopping deposits and withdrawals can also make arbitrage, which closes price differences between markets, more difficult. In this case, the same asset may trade at significantly different prices in different places. Seeing the difference does not mean you can turn it into profit without risk.

Think of liquidity as a condition tied to a specific market, amount, and moment, rather than an unchanging characteristic. To complete the sentence “This coin is liquid,” the questions of where, in which pair, and for how much of a trade are required. In this way, you can better understand the real cost you will face when buying and selling, without confusing volume rankings with actionable prices.

Sources

• Coinbase: Order Book
• CoinGecko: Market Liquidity Methodology
• Uniswap: Price Impact in Pools