When do you kill a strategy?

Every strategy goes through drawdowns that look like death, and traders face the call: is the edge gone or is this normal variance? Kill too early and you abandon a working system; kill too late and you ride it into the ground.

What's your kill rule?

• the drawdown or trade count that triggers review
• how you distinguish broken from unlucky
• the strategy you kept too long or killed too soon

The drawdown guide gives the statistics for making the call.