Adding up/down arrows to Sto chart.

[Trader Thor]

I have stochastics as panel 2 on my charts. I would like to have a down arrow drawn on the sto chart when it crosses below 80 and an up arrow drawn when crosses above 20. this seams simple enough and may have been discussed before but I can't seem to get it to work.

Thanks.

[NinjaTrader_JessicaP]

Hello TraderThor, and thank you for your question. All the below code will go into your OnBarUpdate routine. I will assume the following settings :

[FONT=Courier New]int DPeriod = 3;
int KPeriod = 14;
int smoothing = 7;
int lookbackPeriod = 3;
int upperBound = 80;
int lowerBound = 20;[/FONT]
[FONT=Courier New]bool autoScale = false;
Color upArrowColor = Color.Green;
Color downArrowColor = Color.Red;
[/FONT]

I will also assume that you are interested in your Stochastics K series. If you are interested in the D series you will need to change the code on your end.

First, we need to see if the Stochastics indicator crossed our barriers. That code is

[FONT=Courier New]// Stochastics indicator documented here
// http://ninjatrader.com/support/helpGuides/nt7/stochastics.htm[/FONT]

[FONT=Courier New]// http://ninjatrader.com/support/helpGuides/nt7/crossbelow.htm[/FONT]
[FONT=Courier New]if (CrossBelow(Stochastics(DPeriod, KPeriod, smoothing).K, upperBound, lookbackPeriod))
{
    // Draw our down arrow
}
// http://ninjatrader.com/support/helpGuides/nt7/crossabove.htm
if (CrossAbove(Stochastics(DPeriod, KPeriod, smoothing).K, lowerBound, lookbackPeriod))
{
    // Draw our up arrow
}
[/FONT]

As far as drawing the arrows, you will need to review the code sample here and replace the two appropriate commented out lines with your code :

[FONT=Courier New]// http://ninjatrader.com/support/helpGuides/nt7/drawarrowup.htm
DrawArrowUp("UpArrow" + CurrentBar, autoscale, 0, lowerBound, upArrowColor);
[/FONT]

[FONT=Courier New]// http://ninjatrader.com/support/helpGuides/nt7/drawarrowdown.htm
DrawArrowDown("DownArrow" + CurrentBar, autoscale, 0, upperBound, downArrowColor);
[/FONT]

Please let us know if there are any other ways we may help.