Hyperliquid Stop Loss: Why You Can Be Filled Worse

It rests off the book until the trigger is touched, then sends a market order. A market order takes whatever the book offers, level by level.

If the book is thin or the price gaps through the trigger, the market order walks several levels. A $50,000 stop that triggers into a book with little nearby depth can fill measurably away from the trigger.

For a long, the stop must be above the estimated liquidation price to act first; for a short, below it. If liquidation is reached before the stop, the position is closed by the liquidation process instead.

Treat the stop as a plan, not a guarantee. Size so that a worse-than-expected fill is survivable, and compare the stop to your liquidation estimate before the order goes in. Check visible depth for the market you trade.

Say you hold a long with a stop-market at $100. The price drops fast and the best bids are at $99.60, $99.30, and $98.90, each with the same limited size. Your market order walks those levels and fills on average near $99.27.

That is about $0.73 of slippage per unit. On a 1,000-unit position it is roughly $730 beyond what the trigger implied. If a thin book gaps further, the cost is larger.

Check visible depth, assume a worse fill, and keep margin for it.

• Sizing reward-to-risk off the trigger price instead of a pessimistic fill.
• Placing a stop beyond the liquidation price.
• Using stops in illiquid markets without checking depth.

Before placing a stop, open the market page and look at the visible depth within two or three percent of your trigger, then estimate the fill for your actual size by walking the book. Add that slippage to your risk figure, and confirm the stop is clearly inside the liquidation estimate. If your size is large relative to depth, split the position, use a smaller size, or accept that the stop is an intention rather than a guarantee. Record real fills after the fact so your next estimate is based on evidence.