how to execute same buytotals+buylimitotals??

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how to execute this same buytotals+buylimittotals, if drop -1 to execute?

 
         record totals                   if drop -1       
  if(buytotals + buylimittotals  > buytotals +buylimitotals )
    {
             execute
    } 

egt520

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pls help me....
how from the totals drop -1 to execute it?

example
6 (buy set 6) + 6 (buylimit set 6) totals and take 1 (buystop set = 4)
buy 6 + buylimit 6 + buystop 1= the all total become 13 not 12...
how from here -1 to execute?

thanks

egt520