Magic number is the number that you choose. It can be any number that you want eg 12345 or 432121 or 929292 just as you wish. It is used to mark sent order by the ea to find it later to eg. move stop loss or change take profit or close that order. With magic number you can manage many orders with many ea's and each one of them will know which orders are signed to it. Magic number is independent from the currency or timeframe.

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