there is no specific measuring for it because the market will always different for everytime, and so we just need to set our trading based on the market situation and follow it, and because we do not know for what will happen in the future, there is no right setting for it, but if we know the market, so we can calculate for how many pips we can set the second order,
but usually some traders will use support and resistance as the guide to see entry point and exit point, try it, and i believe it may help you to understand it


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