[amibroker] Code help please

["mozpet2001" <mozpet2001@xxxxxxxxx>]

The following is a simple code for illustration purposes which is meant to enter on the close being greater than the 20 period moving average and exiting on a trailing stop based on the highs minus 3.0 times ATR. I've plotted the trailing stop as an indicator but when I run a backtest of the code below the exits don't line up with trailing stop indicator. In fact the I'm getting exits one bar after entry. I really don't understand what is going on. Can someone help?

Thanks

Maurice

SetBarsRequired(10000,10000); /* this ensures that the charts include all bars AND NOT just those on screen */
SetFormulaName("Weekly SMA System with ATR stop"); /*name it for backtest report identification */
SetTradeDelays( 1, 1, 1, 1 ); /* delay entry/exit by one bar */
SetOption( "initialequity", 100000 ); /* starting capital */
SetOption( "PriceBoundChecking", 1 ); /* trade only within the chart bar's price range */
SetOption( "CommissionMode", 2 ); /* set commissions AND costs as $ per trade */
SetOption( "CommissionAmount", 32.95 ); /* commissions AND cost */
SetOption( "UsePrevBarEquityForPosSizing", True ); /*set the use of last bars equity for trade size*/
SetOption("MaxOpenPositions", 20); // This sets maximum number of open positions to 15;
SetOption(	"AllowPositionShrinking", False);
SetOption("AllowSameBarExit", False);
ATRLevel = 3*ATR(20); 

Cond1 = H>Ref(HHV(H,30),-1);
Cond2 = C>EMA(C,30);
Cond3 = C>=0.5;
Cond4 = MA(V,5)>=500000;
Cond5 = ROC(C, 26) > 30;

Buy = Cond1 AND Cond2 AND Cond3 AND Cond4 AND Cond5;

PositionSize=-10;// invest 10% of portfolio equity in single trade

Sell = 0;
trailARRAY = Null;
trailstop = 0; 

for( i = 1; i < BarCount; i++ )
{ 

   if( trailstop == 0 AND Buy[ i ] ) 
   { 
      trailstop = H[ i ]- ATRLevel[ i ];
   }
   else Buy[ i ] = 0; // remove excess buy signals 

   if( trailstop > 0 AND Low[ i ] < trailstop )
   {
      Sell[ i ] = 1;
      SellPrice[ i ] = trailstop;
      trailstop = 0;
   } 

   if( trailstop > 0 )
   {   
      trailstop = Max( H[ i ]- ATRLevel[ i ], trailstop );
      trailARRAY[ i ] = trailstop;
   } 

} 

Sell = trailARRAY;

Buy =  ExRem(Buy,Sell);
Sell = ExRem(Sell,Buy);




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