Custom indicator using CountIf and Math.Max

[jungsoohuh]

Hello,

I’m struggling with a custom indicator I’m trying to code. It will be great if you can guide me how to handle this. The idea is:

1. If “Condition 1” occurs
2. Start counting the number of instances “Condition 2” occurs
3. Assign the number of occurrences to “X”
4. Draw ArrowUp when “Condition 3” occurs
5. Keep counting until “Condition 1” occurs again (and Reset “X”)
6. Make “X” available for other custom indicators

Condition 1: EMA(20) is the highest value among EMA(20), DEMA(20), and TEMA(20)
Condition 2: Open > SMA(Open, 10) AND Close >SMA(Open, 10)
Condition 3: Value of X is 1 AND Value of X one bar ago is not 1


The basic structure I can think of is:

if (Math.Max(EMA(20), DEMA(20), TEMA(20)) = EMA(20)))
{
Double X =
CountIf(() =>
Open[0] > SMA(Open, 10)
&& Close[0] > SMA(Open, 10)
, “int period”)
};

else
{
X = 0;
}


if (X == 1 && “Value of X one bar ago” !=1 )
{
Draw.ArrowUp(this, "tag1", true, 0, Low[0] - (2*TickSize), Brushes.Red);
}

How should I structure my code? I don’t know what to put in “int period” for CountIf as the indicator should keep counting, in “Value of X one bar ago”.


Reference:
CountIf()

https://ninjatrader.com/support/help...ml?countif.htm

Draw.ArrowUp()

https://ninjatrader.com/support/help...aw_arrowup.htm

Math.Max

https://ninjatrader.com/support/foru...09056-math-max

[NinjaTrader_PaulH]

Hello jungsoohuh,

Thanks for your post and welcome to the NinjaTrader forums!

I don't think Countif() is what you would want to use.

Basically, once condition 1 is true, you want to begin the count and countif() only looks backwards.

I would use a bool variable that is set true once condition one is true

Use that bool to then enable counting condition 2. Use an Int type variable as a counter (pseudo code example):
if (bool && condition 2) // if both are true
{
myCounter++; // increment counter
}

Not sure I understand condition 3, you may need a rethink.

To make "X" available for other indicators, or strategies or market analyzer, I would suggest using a Transparent plot and assigning X to it or 0 on each bar. Plots are double type data series.
Use transparent so it does not show on the chart.
References:

https://ninjatrader.com/support/helpGuides/nt8/NT%20HelpGuide%20English.html?addplot.htm