The most basic technique for establishing an appropriate exit point is the trailing-stop technique.
最基本的技术,建立一个适当的出口点是落后的一站式技术。
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We like to start our trades with the trailing Channel Exit and then add the Chandelier Exit after the price has moved away from our entry point so that the open trade is profitable.
If you actually want to count the number of decimals, you'd probably have to convert to a string, remove any trailing zeroes, and see where the decimal point landed.