Glossary
Expectancy
Part of Your statistics in the PropSurvival glossary — defined the way the engine actually measures it.
- Mean of the whole spreadExpectancy
- Average R per trade:
win rate × avg win R − loss rate × avg loss R − costs. Positive expectancy is the entry ticket; whether it survives a specific firm's rules at your risk size is the actual question.E[R] = p·W − (1−p)·L − costs · measured: expectancy vs win rate
The rule corpus behind this glossary — rules last read 2026-07-16, latest auto-recheck 2026-10-15 · verification log
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