Traders usually assume they can easily buy or sell at any visible price in an order book. However, real-market execution rarely matches this expectation. It looks straightforward on screen, according to the UAE-regulated virtual asset trading platform MidChains CEO Basil Al Askari.
Basil said the moment real size hits the market, that assumption starts to fall apart, especially in crypto.
“What you see on an order book is just a snapshot. It’s not a promise. And that difference matters more than most people realize,” Basil emphasized.
He argued that for small trades, everything feels smooth. A few hundred or a few thousand dollars usually bring the price close to the displayed price with little impact. That creates a sense that liquidity is deep and reliable.
The Complexities of Large Trade Execution
But once trade size increases, the experience changes completely.
A multi-million dollar order doesn’t just “fill” at one price. It works through the book layer by layer, taking liquidity at each level. As that happens, prices shift, orders disappear or refresh, and the market responds to the trade itself.
“This is where the gap shows up, between what looks available and what’s actually tradable at scale,” Basil said.
A lot of what sits on an order book isn’t stable liquidity. Order books often contain fast-moving quotes. Algorithmic systems manage much of this liquidity instead of committing it meaningfully. Consequently, these orders can disappear instantly. In quieter markets, it can all look very deep and tight. Under pressure, that changes quickly.
“That’s why liquidity can feel abundant one moment and thin the next. When larger orders show up, market makers often pull or adjust their quotes, and depth disappears faster than expected. The order book stops behaving like a “pool” of liquidity and becomes much more reactive,” Basil said.
The True Cost of Slippage
The real cost of this shows up in slippage.
“Fees are easy to understand. Slippage isn’t. It’s the gap between the price you expect and the price you actually get, and for larger trades, it often becomes the highest cost in the entire execution,” Basil said.
“On retail-focused exchanges, this can easily end up being more expensive than the trading fee itself, especially when liquidity is fragmented across different price levels,” Basil added.
This isn’t unique to crypto, but it’s more pronounced here because of the market’s structure. Crypto exchanges were largely built for retail traders. Fragmented liquidity stretches across thousands of tokens and trading pairs. Short-term market-making incentives drive most of this capital rather than long-term commitment.
So instead of deep, centralized pools of liquidity, you get something more fragmented and conditional. That also means liquidity is highly sensitive to conditions.
How Volatility and Conditions Shift Liquidity
When markets get volatile, spreads widen, depth drops, and liquidity providers adjust quickly. Ironically, liquidity tends to look best when nothing is happening, and worst when you actually need it.
Because of this, bigger players don’t rely on the visible order book the way retail traders do. They use OTC (over-the-counter) desks, split orders into smaller pieces, or route trades across multiple venues to reduce impact. They’re not assuming what’s on screen is fully real; they’re working around it.
For institutional investors in particular, OTC execution with a regulated counterparty like MidChains is often preferred. Traders avoid fragmented public liquidity by executing trades privately with an OTC desk. This desk sources and internalizes liquidity off-exchange.
This method allows them to fill large blocks at a pre-agreed price. Private execution reduces slippage and limits market impact. Finally, it avoids the signaling effect of showing large sizes on an order book.
OTC acts as the “pressure release valve” of crypto markets, where size can move without distorting price discovery, as public execution often does.
Retail traders often don’t do this because small orders execute without issue. This can hide the bigger structural reality. It only becomes obvious when order size increases or markets get rough.
The market is improving over time. Aggregators combine liquidity more effectively. Execution tools are becoming more advanced. Institutional participation is slowly pushing the industry toward greater structure and efficiency. But the core reality hasn’t changed.
Liquidity in crypto isn’t a fixed thing sitting in an order book. It’s something that appears, shifts, and disappears depending on conditions, behavior, and risk.
What you see on screen is only part of the picture.
And that distinction matters because it explains why prices can move more than expected even in “liquid” markets, and why execution often looks very different in reality than what the order book suggests.
At the end of the day, liquidity isn’t what’s displayed.
“It’s what actually survives when size enters the market,” Basil emphasized.
