Thanks Steve. I will try that. For some reason I was under the impression that SellPrice, CoverPrice etc could only be set to one of four *conditions* (Open, High, Low, Close), and that we could not add or subtract actual numbers from "SellPrice" in real time in the AFL.
In real life, I would exit the trade immediately on the same bar, if I could. In the backtester, I set a one-bar trade delay, as I thought that would be more realistic to the way signals are handled in live trading. But maybe that assumption is incorrect. Over the next month, I plan to play around with a live virtual account at a broker to get a better understanding of this. --- In [email protected], "_sdavis" <[EMAIL PROTECTED]> wrote: > > I think you can do this: > > SetTradeDelays(1,1,1,1); > slippage = ... > SellPrice = Open - slippage; > CoverPrice = Open + slippage; > > However, this may not reflect the way you will actually trade. The > backtested system has a 1 bar trade delay. How are you planning to > trade this in real life? If the profit target or stop level is > detected in real-time will you exit the trade immediately or wait > until the next bar? > > -Steve > > --- In [email protected], "ozzyapeman" <zoopfree@> wrote: > > > > Hi. I am hoping anyone out there can check this code and perhaps give me > > some pointers on how to do the actual scaling up and down of the exit > > prices? > > > > To mimic a more realistic backtesting model for trading Forex, I want to > > scale the backtester's exit prices down 2 pips if a Sell and up 2 pips > > if a Cover. My actual trade system has a 1-bar trade delay so not sure > > how that affects the below code. I added a generic trade system to the > > below code for the sake of simplicity. > > > > Is this the correct approach? Or do I need to add some custom metrics? > > I'm not too sure if this approach is the right way. And I'm still > > missing the meat and potatoes - in the two "ADD CODE HERE" sections: > > > > // Custom Backtester Code to add Slippage to Forex trades > > // > > // We Sell and Cover on Open. > > // But we want actual Sell prices to be slipped down by 2 pips and > > // actual Cover prices to be slipped up by 2 pips. > > > > // First we need to enable custom backtest procedure AND > > // tell AmiBroker to use current formula > > > > SetCustomBacktestProc(""); > > > > // Now custom-backtest procedure follows > > > > if( Status("action") == actionPortfolio ) > > { > > bo = GetBacktesterObject(); > > > > bo.Backtest(1); // run default backtest procedure > > > > // iterate through closed trades first > > > > for( trade = bo.GetFirstTrade(); trade; trade = bo.GetNextTrade() ) > > { > > if( sig.IsLong() AND sig.IsExit() ) //check if the signal is > > a Sell of a Long position > > { > > // ADD CODE HERE: NEED TO REDUCE THE SELL EXIT PRICE BY > > 0.0002 > > } > > > > if( NOT sig.IsLong() AND sig.IsExit() ) //check if the > signal is > > a Cover of a Short position > > { > > // ADD CODE HERE: NEED TO INCREASE THE COVER EXIT PRICE BY > > 0.0002 > > } > > } > > } > > > > // your trading system here > > > > fast = Optimize( "fast", 12, 5, 20, 1 ); > > slow = Optimize( "slow", 26, 10, 25, 1 ); > > Buy=Cross( MACD( fast,slow ),Signal( fast,slow ) ); > > Sell=Cross( Signal( fast,slow ),MACD( fast,slow ) ); > > BuyPrice = SellPrice = ShortPrice = CoverPrice = Open; > > >
