A good stop respects the coin’s noise
Stops fail most often not because the thesis was wrong but because they sat inside the asset’s normal breathing range. This tool turns volatility into an actual probability of being tagged so you can place stops beyond the noise. Size the trade around that distance on the position size calculator.
How likely is your stop to get tagged?
For a random-walk approximation, the probability that price touches a level before expiry rises with volatility and time, and falls with distance. The rule-of-thumb version: a stop placed one expected daily move away has roughly a 50–60% chance of being touched within a couple of days of sideways action. Most traders place stops much closer than they think in volatility terms.
Concrete framing: a coin with 4% daily volatility and your stop 2% away — that's half a daily move. Short of a strong trend in your favor, that stop is more likely to be hit than not within the first day or two. The trade might be right and the stop still dies first.
The fix is not "no stops" — it's stops measured in volatility units instead of round numbers. One to one-and-a-half daily moves of distance survives noise while still capping disaster. If that distance makes your position size uncomfortably small, the honest conclusion is the trade was too big, not that the stop was too wide.