Nifty option but for monitoring ce and pe

I want to monitor atm strike price of nifty atm ce and pe at 9.20 and when 20% of that is achieved then I am entering buy position and immediately I am going to place sl order for that position cost to cost how should I do this strategy in tradetron?

//Not an investment advice

See this post, this is very similar. As stated this probably is a good case for custom coding