newbie question

[kaywai]

for example i have this script,

if (Open[0] < Low[period])
{
upwardbreak = Low[period];
}

if the condition is not met, how do i say "do nothing"? Or I don't have to write a script for "do nothing"?

The reason why I ask this is because the script is suppose to "do something" when a certain condition is met. If you look at the attached chart, that green square, to me, is some number plucked from somewhere! BTW script is also attached.

[NinjaTrader_Bertrand]

kaywai, depends on your script and logic - if you do not change the value (condition not met) it would keep the assigned one.

[NinjaTrader_Josh]

To do nothing, just don't code anything and it won't do anything.

What your code is doing right now is setting variables to highs and lows. Then you are drawing the dots on every single bar. Even if no new high/low is set, it is still drawing the dots with the old values. You need to place them inside the if-statement if you don't want them to draw.

[kaywai]

Josh, I understand what you are saying but not quite sure how to achieve that end? Would you mind helping? The script is attached to the initial posting

[NinjaTrader_Bertrand]

Like this -

 
 
if ((Open[0] < Low[period]))
   {
    upwardbreak = Low[period];
    DrawSquare("tag1", true, 0, upwardbreak, Color.Green);
   }

[kaywai]

Bertrand, It certainly looks a lot better now!

Question I have now is how do i give instructions so that if either of the conditions is not met, the square doesn't print at all?

[NinjaTrader_Josh]

Use bool variables. Only when both bool variables are true do you draw the dot, otherwise don't draw.

[kaywai]

guys, would you mind giving some pointers on how to begin with bool? tried something along the lines of:-

private BoolSeries myBoolSeries;
myBoolSeries = new BoolSeries(this);

myBoolSeries.Set(Open[0] < Low[period] ? true : false);

got stuck after that...

[NinjaTrader_Josh]

kaywai,

No need to go to a BoolSeries. A simple bool would do.

In Variables region you can go:

private bool condition1 = false;
private bool condition2 = false;

Then in your OnBarUpdate():

if (Open[0] < Low[period])
{
     condition1 = true;
}
else
{
     condition1 = false;
}

if (some other condition)
{
     condition2 = true;
}
else
{
     condition2 = false;
}

if (condition1 == true && condition2 == true)
{
     DrawSquare(...);
     DrawSquare(the other square...);
}

[kaywai]

Thank you very much for your help Josh!