DrawText crashes script...

[dhunnewell]

This works:

 
protected override void OnBarUpdate()
{
double Pressure;
int BidPressure=GetCurrentBidVolume();
int AskPressure=GetCurrentAskVolume();
if (BidPressure>AskPressure)
{
Pressure=BidPressure/AskPressure;
DrawArrowUp("Pressure",0,Close[0]+(Pressure/100),Color.Red);
}
else
{
Pressure=-AskPressure/BidPressure;
DrawArrowDown("Pressure",0,Close[0]+(Pressure/100),Color.Green);
}
}

This doesn't:

 
 
protected override void OnBarUpdate()
{
double Pressure;
int BidPressure=GetCurrentBidVolume();
int AskPressure=GetCurrentAskVolume();
if (BidPressure>AskPressure)
{
Pressure=BidPressure/AskPressure;
DrawArrowUp("Pressure",0,Close[0]+(Pressure/100),Color.Red);
}
else
{
Pressure=-AskPressure/BidPressure;
DrawArrowDown("Pressure",0,Close[0]+(Pressure/100),Color.Green);
}
DrawText("PressureText",Pressure.ToString(),0,Close[0],Color.Black);
}

?

[NinjaTrader_RyanM1]

Hello Dhunnewell,

That code is compiling and drawing text for me. What issue are you having with DrawText? Please check the log tab and report if there are any error messages.

[dhunnewell]

Yup, got the following:
3/3/2010 4:05:26 PM,Default,Error on calling the 'OnBarUpdate' method for indicator 'BidAskRatio' on bar 0: BidAskRatio.DrawText: startBarsAgo out of valid range 0 through 0, was 1.,

Yes, there are pleny of bars on the chart! I think perhaps it is because the assignmentof my vars:
BidPressure=GetCurrentBidVolume()
BidPressure=GetCurrentAskVolume()
is limiting the scope to the current bar?

[dhunnewell]

please note that the script sent indeed used 0 for start barsago and It is when this value is 1 that the script fails:

DrawArrowUp("Pressure",0,Close[0]+(Pressure/100),Color.Red);

should be:

DrawArrowUp("Pressure",1,Close[0]+(Pressure/100),Color.Red);

[NinjaTrader_RyanM1]

Hello,

You're running into the issue below:

http://www.ninjatrader-support2.com/vb/showthread.php?t=3170

You'll need a CurrentBar check.

 
if (CurrentBar < startBarsAgo)
   return;

startBarsAgo is whatever value you plug in for this parameter on your DrawText() statement.

[eDanny]

protected override void OnBarUpdate()
{
if(CurrentBar < 1)return;
double Pressure;
int BidPressure=GetCurrentBidVolume();
int AskPressure=GetCurrentAskVolume();
if (BidPressure>AskPressure)
{
Pressure=BidPressure/AskPressure;
DrawArrowUp("Pressure",0,Close[0]+(Pressure/100),Color.Red);
}
else
{
Pressure=-AskPressure/BidPressure;
DrawArrowDown("Pressure",0,Close[0]+(Pressure/100),Color.Green);
}
DrawText("PressureText",Pressure.ToString(),0,Clos e[0],Color.Black);
}

Edit: Oops sorry, I see it was answered

[dhunnewell]

Thx, that did it!