Education1 min read
Exposure caps stop-losses and cooldowns · three basic risk rules
Risk control doesn't have to be complex, but it must be explicit. Three of the most common rules — what each guards against, how it's set, and its limits.
By Ruleap Star Team · Published
When people think of risk control, they often imagine complex mathematical models. In practice, the first thing to build is usually a few simple, explicit rules that a strategy can't get around.
Rule 1: exposure cap
An exposure cap limits how large the overall position can be. If the cap is 50% and exposure is already at 50%, any “add more” signal gets blocked. It guards against a strategy betting heavier and heavier on a run of signals.
Rule 2: stop-loss
A stop-loss is a predefined exit condition — for example, exit when price moves against you by a set amount. Its value isn't in exiting perfectly every time, but in keeping any single loss within a tolerable range so one mistake can't cause irreparable damage.
Rule 3: cooldown
A cooldown requires a minimum gap between executions. When prices whipsaw, signals can fire repeatedly in a short span; a cooldown keeps the system from being led around by noise and racking up unnecessary costs.
How the rules relate
Each rule is checked independently: if any one fails, the signal doesn't execute. They aren't there to raise returns — they're there to keep the system under control in the worst case.
Limits and trade-offs
- Set a cap too low and you may miss valid signals; too high and it's no limit at all.
- In a sharp gap, a stop-loss may not fill at the expected price.
- Too long a cooldown can make the system slow to react to a genuine turn.
You can toggle rules such as the exposure cap and cooldown in this site's interactive demo and see how blocked signals change on the same simulated market. Numbers here are illustrative. This article explains a method and is not investment advice.