I got stopped out of a long on a Friday night in October 2025, and the chart showed a candle that looked like a verdict. Price had cratered. Everything I believed about the trade felt wrong in that moment.
Then, within the hour, most of the move was gone. The wick had a story, but it wasn't an opinion about Bitcoin.
Forced sellers don't have a view
Here's what a liquidation is. When a leveraged position runs out of margin, the exchange closes it for you with a market order. It doesn't ask what price is fair. It sells into whatever bids are sitting there.
On October 10, 2025, the widely reported figure was roughly $19 billion of positions liquidated in about a day. Most accounts of it call it the largest liquidation event crypto has seen. Numbers like that don't come from a change of heart among investors. They come from machinery.
Think about what that means for a stop-loss. A stop is a promise to leave at a price. A liquidation is the exchange leaving for you, at whatever price exists, in whatever size it needs. The two behave very differently when the book is thin.
How the machinery feeds itself
Picture the order book as a staircase of bids, each step holding a few contracts. A first wave of liquidations eats three steps. Price drops to the fourth.
That drop pushes the next group of accounts past their margin limit. Their forced sells hit the book too. Meanwhile market makers, seeing the speed, pull their quotes, so each step gets thinner exactly when more sellers arrive.
I think of it as a feedback loop with no one inside it making decisions. Sellers sell because price fell. Price falls because sellers sold. Some altcoins reportedly printed prices that were wildly off for a few minutes, and a few venues struggled to stay online.
Why your stop was a casualty, not a signal
If you were stopped out in that window, your fill probably reflected the thinnest book of the year. Stops are market orders in disguise. They get whatever the staircase offers, and mid-cascade the staircase has missing steps.
Then the forced selling ran out, because there was nothing left to liquidate. Price snapped back toward where it started. The traders who exited at the low paid for the book's emptiness, not for a bad read.
What most people get wrong
Most traders read the wick as information about the asset. They decide the thesis is dead, or that they should've sold earlier, or that they need tighter stops next time. Tighter stops make it worse, because tight levels are what cascades eat first.
The better question is structural. Was my loss caused by my trade being wrong, or by the market briefly being unable to absorb anyone's trade? Those need opposite responses. One means changing the strategy. The other means changing nothing, except maybe your size.
Ask yourself this. If your account had been flat that night, would you have learned anything about your strategy? Probably not. So why let a few minutes of forced selling rewrite your rules?
Two things I do about it
First, I size every position assuming the exit will be worse than the chart suggests. If a 2% stop could realistically fill 5% away in a gap, I size for 5%. That keeps one ugly fill from becoming a decision about the whole account.
Second, after any extreme wick I tag the loss in my journal as either "signal" or "structure." Over a year of tags you learn how much of your drawdown was the strategy and how much was weather.
Leverage is what turns weather into liquidation, so it's worth keeping modest. At v33 Systematic the strategies run at conservative leverage for this reason, and the drawdown data we publish at v33systematic.com includes the ugly fills, not only the clean ones.