I want to perform an action (e.g., draw an arrow, play a sound or enter a trade) intrabar (only once) when price crosses X number of ticks below/above the current bar's open. How would I code that condition in an indicator or strategy?

For instance, on a UniRenko bar chart configured for a reversal bar at 30 ticks, if the bars are trending up and price pulls back 20 ticks below the open, I want to play a wav to alert me.

vickisb 

I want to perform an action (e.g., draw an arrow, play a sound or enter a trade) intrabar (only once) when price crosses X number of ticks below/above the current bar's open. How would I code that condition in an indicator or strategy? For instance, on a UniRenko bar chart configured for a reversal bar at 30 ticks, if the bars are trending up and price pulls back 20 ticks below the open, I want to play a wav to alert me.

Can you post the code you are using?
Also, you may get better results if you post on this thread.

Want your NinjaTrader indicator created, free? Hey guys, I thought many of you would enjoy and benefit from this thread. My intention is to have each poster reply and describe in as much detail as possible an indicator they want created for NinjaTrader. The programmers on the forum (there are many), …

DavidHP 

Can you post the code you are using? Also, you may get better results if you post on this thread. Want your NinjaTrader indicator created, free? Hey guys, I thought many of you would enjoy and benefit from this thread. My intention is to have each poster reply and describe in as much detail as possible an indicator they want created for NinjaTrader. The programmers on the forum (there are many), …

Thanks. Here's the post in the thread you suggest, with more details:

Want your NinjaTrader indicator created, free? I want to perform an action (e.g., draw an arrow, play a sound or enter a trade) intrabar (only once) when price crosses X number of ticks below/above the current bar's open. How would I code that condition in an indicator or strategy? For instance, …

vickisb 

I want to perform an action (e.g., draw an arrow, play a sound or enter a trade) intrabar (only once) when price crosses X number of ticks below/above the current bar's open. How would I code that condition in an indicator or strategy? For instance, on a UniRenko bar chart configured for a reversal bar at 30 ticks, if the bars are trending up and price pulls back 20 ticks below the open, I want to play a wav to alert me.

Here's a solid approach for this:
By default, NinjaScript runs on Calculate.OnBarClose, which only evaluates OnBarUpdate() once per fully closed bar — so to catch a pullback happening intrabar, you'll want Calculate.OnEachTick (or OnPriceChange) set in State.Configure instead. Otherwise you'll never see the price movement happening inside the bar.
For the "fire exactly once per bar" behavior, use a flag that resets only when the bar actually changes (not every tick), then gate your action behind that flag:
csharpprivate bool firedThisBar = false;
private int lastBar = -1;

protected override void OnBarUpdate()
{
if (CurrentBar < 1) return;

// Reset the flag exactly once when we roll onto a new bar
if (CurrentBar != lastBar)
{
firedThisBar = false;
lastBar = CurrentBar;
}

if (firedThisBar) return;

double pullbackTicks = 5; // set your desired offset
double threshold = pullbackTicks * TickSize;

if (Open[0] - Close[0] >= threshold) // pullback from open example
{
firedThisBar = true;
// your action here: Draw.ArrowDown(), PlaySound(), EnterShort(), etc.
}
}
This works the same way on UniRenko bars, since the logic is based on Open[0]/Close[0] of the current bar rather than time — just make sure your tick offset math matches your instrument's TickSize.

AI will likely code that up for you in a couple minutes , it's that simple most of the time especially with something this straightfoward