Flash crash in gold trading

A flash crash is an abrupt collapse in price that happens far faster than normal trading would explain, usually followed by a sharp rebound. The cause is typically a large order or a cascade of stop-losses hitting a market with very little liquidity on the other side.

How it applies to gold trading

Gold is deep during London and New York hours but thin in the early Asian session, on public holidays and just after the Sunday open. In those windows a big sell order can push XAUUSD through several dollars of empty price, triggering stops on the way, which adds more selling. Once the selling stops, buyers return and price often recovers much of the drop within minutes.

The damage is done by the orders that fill during the drop. Sell stops become market orders and can fill far below their level. Positions on high leverage can hit the stop-out level and be closed at the worst prices of the move.

Worked example

Example (hypothetical numbers): during the Asian session gold falls from 4,020 to 3,985 in 90 seconds and recovers to 4,010 within ten minutes. A trader long 1 lot with a stop at 4,005 is filled at 3,992 because of the gap in prices, losing $28 × 100 = $2,800 instead of the planned $1,500 from a 4,020 entry.

A common mistake

Running maximum leverage with stops at obvious round numbers overnight. Smaller size and stops placed away from crowded levels limit the harm when liquidity vanishes.

See also: News spike, Slippage, Stop-out, Liquidity sweep.

Frequently asked questions