what should be used?



I have the majority of my EA set up but the only piece im missing now is the part where "if this pair drops then take a sell trade for this different pair".

Is this some thing someone could help with please? 

Many thanks


Dave McBride: "if this pair drops then … help with
  1. Until you can state your condition in concrete terms, it can not be coded. (A down candle is a drop in a lower timeframe.)

  2. Help you with what? You haven't stated a problem, you stated a vague want. Show us your attempt (using the CODE button) and state the nature of your problem.
              No free help 2017.04.21

    Or pay someone. Top of every page is the link Freelance.
              Hiring to write script - General - MQL5 programming forum 2018.05.12