Win rate and R:R together
Risk & Position Sizing
Win rate alone tells you nothing
Win rate alone means nothing without knowing the size of wins and losses. A trader who wins 30% of the time can still be highly profitable if winners average 4R and losers average -1R.
The math behind it
The math: 30 wins times 4R equals +120R. 70 losses times -1R equals -70R. Net result, +50R across 100 trades, positive despite losing on most individual trades.
Don't chase win rate alone
Chasing a high win rate by itself, while ignoring the size of the average win versus the average loss, is a common way traders convince themselves a losing system is working.