The fixed dollar approach uses relatively simple math for breaking even as shown below.
Example:
3 losing trades followed by 1 winning trade using 1:3 risk-to-reward achieves breakeven (ignoring trading fees and slippage)
This risk-to-reward ratio itself implies the win-rate needed (lose $100 three times, win $300 once, you break even).
The fixed dollar amount risk doesn't deal with compounding. As such, its logic cannot be used for fixed %.
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May Belle
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