You already know liquidity is your exit. Now go one level deeper and learn to read the order book, the live list of buy orders and sell orders stacked at each price. Buy orders sitting below the current price are called bids. Sell orders sitting above it are called asks. Reading them tells you where the real money is waiting, not just where price happens to be right now.
Depth is how much size is stacked at each level. A big wall of bids just under the price is a spot where buyers are ready to catch a fall. A big wall of asks just above is a ceiling where sellers are waiting to unload. Thin depth on one side means price can slide through it fast, because there is almost nothing there to slow it down.
Be careful, because not every wall is real. A spoof is a large order placed to scare you, then pulled the moment price gets close, so it never actually fills. Treat a wall as a clue about intent, not a guarantee. What matters is whether the size stays put and actually absorbs trades when price reaches it.
Use depth to plan, not to predict. If the book is thin above you, a small burst of buying can rip price higher, which is why fast markets gap so hard. If it is thin below you, protect yourself, because a single big seller can drop you through empty space before any bid catches it.
The order book shows where buyers and sellers are actually waiting. Thin depth means price moves fast through that level, so plan your entries and exits around where the real size sits.
Tip. When you see a giant wall, watch whether it fills or vanishes as price approaches. A wall that disappears was never real support, it was a bluff meant to move you.