Result
Equivalent lots on Broker B
— lots
—
Money at risk (at stop)
—
Pip-value ratio A / B
—
Risk per pip · Broker A
—
Risk per pip · Broker B
Why 0.10 lots is not the same risk: at each broker the pip value per lot differs, so the same nominal lot size moves a different amount of money per pip.
How it works
Match the money, not the lot number
To keep identical risk you scale the lot size by the ratio of pip values. If Broker B pays less per pip per lot, you need more lots on B to feel the same move — and vice versa.
lotsB = lotsA × (pipA ÷ pipB)
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