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Please help with code

hey guys , i need this code : i have 3 positions , first position is OP_BUY with lot 0.01 , second position is OP_SELL with lot 0.02 , third position is OP_BUY with lot 0.04 , when first position closed by take profit , close second position with lot 0.01 and third position close with lot 0.02