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Pete
I have tried to do the same thing without success. I hope someone
will suggest how this can be done.
Larry
--- In amibroker@xxxxxxxxxxxxxxx, "Pete" <dryheat3@xxx> wrote:
>
> Ok, here's the code that I built. As far as my understanding goes,
this
> code should work perfectly. Yet it does not. Load this into your AB
and
> before running the back test make sure you have debug app running to
> capture the _Trace() output.
>
> Run this against an intraday chart of ES. I am assuming you already
have
> the tick size, point value and margin deposit cofigured in your
> database. You can use a 3, 5 or 10 minute chart settings for the
> backtest. Run the back test in Short only mode and set the report to
> detailed log so you can see any scaling of trades. The scaling
works,
> this is NOT what I am trying to get working. The problem with this
code
> is it misses entry signals ONLY when including shorts. Longs work
just
> perfectly.
>
> Examining the debug output you will see the short signals are
driving
> portfolio equity into the negatives, even when the back tester may
be
> reporting a net profit. It's when the portfolio equity is driven
into
> the negatives that it cuases this system to miss several entry
signals.
>
> You can scan the debug output for a point short entry where the
> portfolio equity is negative, then go to the back tester output and
see
> if you can find that trade in the list. If the equity is negative
there
> is no entry in the back tester. If the equity is positive, then the
> trade will be found in the back tester.
>
> Some of the statments in this code are a bit long so I'm not sure
how
> well it will copy/paste from the web into .afl. You may need to
remove
> some line wrapping after pasting into AB.
>
> I'm going to figure this out, or go mad trying. So your assistance
may
> prevent my early retirement to the funny farm. lol!
>
> SetTradeDelays(0,0,0,0);
> BuyPrice = Close;
> SellPrice = Close;
> SetOption("FuturesMode", True);
> SetOption("InitialEquity", 10000);
> Buy = Cross(MA(C, 20), MA(C,50));
>
> Short = Cross(MA(C,50), MA(C,20));
>
> SystemExitLong = Cross(MA(C,18), C); // This value will be adjusted
> according the system's exit rules
> SystemExitShort = Cross(C, MA(C,18));
>
> StopAmt = 1.5; //number of points
> ProfitTarget = 3;//number of points
>
>
>
> TickIncrement = Param("Tick Increment", 0.25, 0.1, 1, 0.1);//ES =
0.25,
> NQ = 0.10, YM = 1
> TickIncrement = TickIncrement * 1; //change this value according to
the
> expected slippage when stops are tiggered
>
> //set begining value of essential variables
> TrailingStop = 0; // This value will be adjusted to
FirstProfitTarget
> only after SecondProfitTarget is hit
> StopLoss = 0;
> FirstProfitTarget = 0;
> SecondProfitTarget = 0;
> //set begining values for long variables
> priceatbuy=0;
> highsincebuy = 0;
> Sell = 0;
> TradeDate = DateTime();
> //set begining values for short variables
> priceatshort=0;
> lowsincebuy = 0;
> Cover = 0;
>
> //set exit to zero
> exit = 0;
> PortEq = Equity();
>
>
> ////////////////////////////////////////////////////////////////////
////\
> ///
> //////////////Begin code to scale out of
positions////////////////////
> ////////////////////////////////////////////////////////////////////
////\
> ///
> for( i = 0; i < BarCount; i++ )
> {
> if( priceatbuy == 0 AND Buy[ i ] )
> {
> //initialize required variables
> _TRACE("Long Entry = " + DateTimeToStr(TradeDate[i]) +" AND Buy
Price =
> " +BuyPrice[i] +" AND Equity in-loop: " +PortEq[i]);
> priceatbuy = BuyPrice[ i ];
> StopLoss = StopAmt[i];
> FirstProfitTarget = StopAmt[i];
> SecondProfitTarget = ProfitTarget[i];
> }
>
> if( priceatshort == 0 AND Short[ i ] )
> {
> //initialize required variables
> _TRACE("Short Entry = " + DateTimeToStr(TradeDate[i]) +" AND Short
Price
> = " +ShortPrice[i] +" AND Equity in-loop: " +PortEq[i]);
> priceatshort = ShortPrice[ i ];
> StopLoss = StopAmt[i];
> FirstProfitTarget = StopAmt[i];
> SecondProfitTarget = ProfitTarget[i];
> }
>
> if( priceatbuy > 0 )
> {
> highsincebuy = Max( High[ i ], highsincebuy );
>
> //check if 1st target hit and long
> if( exit == 0 AND
> High[ i ] >= FirstProfitTarget + TickIncrement +
priceatbuy )
> {
> // first profit target hit - scale-out
> exit = 1;
> Buy[ i ] = sigScaleOut;
> BuyPrice[i] = FirstProfitTarget + priceatbuy;
> }
>
> //check if 2nd target hit and long
> if( exit == 1 AND
> High[ i ] >= SecondProfitTarget + TickIncrement +
priceatbuy
> )
> {
> // second profit target hit - scale-out
> exit = 2;
> Buy[ i ] = sigScaleOut;
> BuyPrice[i] = SecondProfitTarget + priceatbuy;
> TrailingStop = FirstProfitTarget + priceatbuy; //after
> hitting SecondProfitTarget, move
>
> //stop to FirstProfitTarget position
> }
>
> //check if system exit hit and long
> if( exit <= 2 AND
> SystemExitLong [i]) //need to substitute system exit here
> {
> // System Exit hit - exit all remaining contracts
> exit = 3;
> SellPrice[i] = Close[i]; //all three contracts would
exit
> here
> }
>
> //check if trailing stop hit and long
> if( exit == 2 AND
> Low[ i ] <= TrailingStop - TickIncrement )
> {
> // Trailing Stop target hit - exit trade with final
contract
> exit = 3;
> SellPrice[ i ] = TrailingStop -
TickIncrement ; //accounting
> for one tick slippage
> }
>
> //check if stop loss hit and long
> if(Low[ i ] <= priceatbuy - StopLoss - TickIncrement )
> {
> // Stop Loss hit - exit
> exit = 3;
> SellPrice[ i ] = Min( Open[ i ], priceatbuy - StopLoss -
> TickIncrement ); //assume one tick slippage
> }
>
> //check if exit complete
> if( exit >= 3 )
> {
> Buy[ i ] = 0;
> Sell[ i ] = exit + 1; // mark appropriate exit code
> exit = 0;
> priceatbuy = 0; // reset price
> highsincebuy = 0;
> ThirdProfitTarget = 0;
> TrailingStop = 0;
>
> }
> }
>
> if( priceatshort > 0 )
> {
> lowsincebuy = Min( Low[ i ], lowsincebuy );
> //check if 1st target hit and short
> if( exit == 0 AND
> Low[ i ] <= priceatshort - FirstProfitTarget -
TickIncrement )
> {
> // first profit target hit - scale-out
> exit = 1;
> Short[ i ] = sigScaleOut;
> ShortPrice[i] = priceatshort - FirstProfitTarget;
> }
> //check if 2nd target hit and short
> if( exit == 1 AND
> Low[ i ] <= priceatshort - SecondProfitTarget -
TickIncrement
> )
> {
> // second profit target hit - scale-out
> exit = 2;
> Short[ i ] = sigScaleOut;
> ShortPrice[i] = priceatshort - SecondProfitTarget;
> TrailingStop = priceatshort -
FirstProfitTarget ; //after
> hitting SecondProfitTarget, move
>
> //stop to FirstProfitTarget position
> }
> //check if system exit and short
> if( exit <= 2 AND
> SystemExitShort[i]) //need to substitute system exit here
> {
> // System Exit hit - exit all remaining contracts
> exit = 3;
> CoverPrice[i] = Close[i]; //all three contracts would
exit
> here
> }
> //check if trailing stop hit and short
> if( exit == 2 AND
> High[ i ] >= TrailingStop + TickIncrement )
> {
> // Trailing Stop target hit - exit trade with final
contract
> exit = 3;
> CoverPrice[ i ] = TrailingStop + TickIncrement ;
> }
> //check if stop loss hit and short
> if(High[ i ] >= priceatshort + StopLoss + TickIncrement )
> {
> // Stop Loss hit - exit
> exit = 3;
> CoverPrice[ i ] = Max( Open[ i ], priceatshort +
StopLoss +
> TickIncrement ); //assume one tick slippage
> }
> //check if exit complete
> if( exit >= 3 )
> {
> Short[ i ] = 0;
> Cover[ i ] = exit + 1; // mark appropriate exit code
> exit = 0;
> priceatshort = 0; // reset price
> highsincebuy = 0;
> ThirdProfitTarget = 0;
> TrailingStop = 0;
>
> }
> }
>
> }
>
> SetPositionSize(3,spsShares); //Trade 3 contracts on entry
> SetPositionSize( 1, IIf( Short == sigScaleOut OR Buy == sigScaleOut,
> spsShares, spsNoChange ) ); //scale out 1 contract at a time until
> position closed
> ////////////////////////////////////////////////////////////////////
////\
> ///
> //////////////End of code to scale out of
positions////////////////////
> ////////////////////////////////////////////////////////////////////
////\
> ///
>
------------------------------------
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