A constant percent risk bound beats a higher win rate

A planned loss that stays a fixed share of capital

A 16-trade historical sample held trading capital fixed at 100000, counted only realized closed-trade results, and treated every loss as the full planned risk amount.

Constant percent risk sizes every trade so the planned loss, if the stop-loss is hit, is always the same percentage of current trading capital. In that sample, a constant 2 percent risk rule meant a 2000 loss on every losing trade, while a 10 percent risk rule meant a 10000 loss.

A stop-loss is a pre-set exit that closes a losing trade so the loss cannot expand beyond that planned share of trading capital. The bound is set before entry and held through the position.

A higher win-loss ratio was the slower lever

Win-loss ratio is used here only as a skill-level label, not as a target to optimize first. It is the share of closed trades that finish profitable.

Raising the win-loss ratio from 50 percent to about 81 percent improved period return from 21.7 percent to 41.6 percent when risk stayed capped at 2 percent. The source presents that jump as slow and hard to sustain.

A 62.5 percent win-loss ratio with 2 percent risk produced a 28.8 percent period return. The same skill level turned into a 19 percent loss when each losing trade was allowed to consume 10 percent of capital.

At that 62.5 percent skill level, cutting risk from 10 percent to 5 percent and then to 2 percent flipped results from a 19 percent loss to a 14 percent profit and then to a 29 percent profit.

Five percent risk is what first turned results profitable

Only the highest illustrated skill level, an 81.2 percent win-loss ratio, still finished positive after 10 percent losses. Even then the period return was only 17.6 percent, versus 32.6 percent at 5 percent risk and 41.6 percent at 2 percent risk.

The source argues that pairing skill improvement with a stop-loss discipline that keeps each loss to 5 percent of capital is what first moves a trader into profitable results. Continuing to allow 10 percent losses remains a failure path below the top skill level.

The illustrated professional end-state is not a larger loss budget. Once skill is high enough to survive 10 percent losses, the same discipline still keeps planned risk at 2 percent or less.