[amibroker] Position size as % of equity in futures mode

["pmxgs" <pmxgs@xxxxxxxxxx>]

Hi,

I'm having trouble defining position size in futures mode.
What I want to do is to risk a certain % of current equity on each 
trade, based on the stop loss $$ value.
For example in EURUSD, I want to risk 3% of my equity (suppose it is 
25000 in the current bar) and my stop loss is 25 pips away from entry 
point. (Assuming lots of 100k => pointvalue=100.000; 
margindeposit=1000)

risk=>25.000*0.03=750

=>750/(0.0025*100000)=3lots

In the example above I would trade 3lots(contracts), so positionsize 
would be 3,000.

I can do this if I allways risk a fixed amount, but I don't know how 
to do it referring to the current value of equity which varies bar by 
bar.
How can I do this in AB (I've already filled in the tick size, point 
value,margin deposit in the synmbol page and selected futures mode)?

thanks



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