[amibroker] changing entry price in CBT

[ta]

I want to buy half position on the opening price and half position on the
closing price of the same bar. I have not been able to figure out how to
this. I tried the following two ways without success. Any help would be
appreciated. TIA

 

for ( sig = bo.GetFirstSignal( i ); sig; sig = bo.GetNextSignal( i ) )

{

//            BuyPrice = Open; 

                sig.price = Open;

                bo.EnterTrade( i, sig.Symbol, True, sig.price,
sig.PosSize/2, sig.PosScore, RoundLotSize = 1);

//            BuyPrice = Close;

                sig.price = Close;

                bo.EnterTrade( i, sig.Symbol, True, sig.price,
sig.PosSize/2, sig.PosScore, RoundLotSize = 1);

 

}