programming code

[peterhxu7]

i would like to add a condition into my strategy, it didn't work
this is my if condition
if
(
BarColor = Color.Green
)
{
DrawArrowUp("my up arrow" + CurrentBar, 0, Low[0] + (-4*TickSize), Color.Green);
// draws a up arrow with the color of green at High[0]
}

it kept on saying error
what 's the right code for my logic

[jeronymite]

C# operators

Hi peterhxu7,

The operator for logical equivalence (does this equal that?) is two equal signs. One equal sign is an assignment operator. So:

if (BarColor == Color.Green)
{
// Do whatever
}

Hope that helps.

These references are worth looking at:

NT7 online Help: http://www.ninjatrader.com/support/h...nt7/index.html
C# reference: http://msdn.microsoft.com/en-us/library/kx37x362.aspx

Cheers.

[NinjaTrader_Bertrand]

Thanks for the assist jeronymite - can you please check into using two equal signs for this condition Peter and let us know if it resolves your compile issue?

[peterhxu7]

thanks jeronymite. it did compile . but it didn't show any Green Up Arrows on the chart. what's the problem now?

[jeronymite]

Check decoumentation

Hi Peter,

First, it's worth getting into the habit of checking the documentation on the feature you are trying to use as a starting point for any issue with something you may not be familiar with.

In this case, the NT7 Online Help (previously provided as a link) shows the syntax for the DrawArrowUp method as follows:

DrawArrowUp(string tag, bool autoScale, int barsAgo, double y, Color color)
DrawArrowUp(string tag, bool autoScale, DateTime time, double y, Color color)

Here is your specific invocation of that method:

DrawArrowUp("my up arrow" + CurrentBar, 0, Low[0] + (-4*TickSize), Color.Green);

The parameters in your code do not match in number and type with the formal syntax.

I recommend you try something like:

DrawArrowUp("My Up Arrow", true, 0, Low[0] + (-4*TickSize), Color.Green) ;
// This matches up with this correct form of syntax ...
DrawArrowUp(string tag, bool autoScale, int barsAgo, double y, Color color)

Hope that helps.

Do try to make the avaliable documentation for NT and C# your best friends and use them as the first port of call. You will develop your NinjaScript and C# programming capabilities much more quickly that way.

Cheers.