Open one order, when MAs intersect and close it, the next trade will be open in next MAs intersect

Can somebody help me, how can I write the code, because I am beginner of programming in mql.

In My strategy are two Simple Moving Average and Average Directional Movement Index.

I want open buy, when SMAB>SMAR && PlusDI>MinusDI && ADX>ADXLevel

And I close it on TakeProfit or Stoploss. If the buy closed, I want wait to open sell, NO open next order buy.

When MAs intersect I want open only one trade to next MAs intersect.

I don't know, how can I continue with programming.

Thank you very much!