You will have to make these calculations:

• A = initial Capital (10000 in this case,which is 100%)
• B = current Capital which is 9580 (10000 – 3.2%)
• C = current target profit with 1 lot (2% of the entry price)
• D = A+1% – B            (which is the target profit to reach A + 1%, i.e. 10100)
• LotSize = D / C

If your entry price is, say, 16000, the above calculations will be:

• A = 10000
• B = 9580
• C = 320       (2% target profit, with 1 lot)
• D = 420      (A+1% – B)
• LotSize = 420 / 320     which yields 1.3125 lots (you may round it)

So, if you BUY 1.3125 lots at 16000 and your planned Target Profit is reached, your current Capital at that time will be 10100 (the initial Capital + 1%).

Also a thanks for the reminder with the wrong forum. It happened me too from time to time that I ended up in the wrong forum. I try very hard to keep it, sometimes it still does not work. I am sorry for that.

Ok, take your time, I will read and test your code when available.

I changed the code a little bit, adding the variable named maxcapital and the Stop Loss, then I moved boith SL and TP inside the IF…ENDIF block. I also made the calculation of C, D and lotsize only when Not OnM arket.

This code seems to be working fine:

defparam cumulateorders= false
once lotsize  = 1
once capital  = 10000                                         // A
actualCapital = capital + strategyprofit                      // B
maxcapital    = max(capital,actualcapital)
IF Not OnMarket THEN
   tpTrade = close/100 * 0.2                                  // C
   tpCapital = (maxcapital + maxcapital*0.01) - actualCapital // D
   lotsize = round(tpCapital/tpTrade,2)                       // lotsize
ENDIF
longcond  = Not Onmarket AND average[10] CROSSES OVER average[20]
If longcond then
   IF actualcapital < maxcapital then
      buy lotsize contracts at market
   elsif actualCapital >= maxcapital then
      buy 1 contract at market
   endif
   set target profit tpTrade
   set stop   loss   tpTrade
Endif
graph tpCapital coloured("Green")
graph tpTrade   coloured("Red")