Add / Substartct two EMA's

[dkbyond]

In strategy builder how can I code on the left side - if EMA(A) - EMA(B). Thanks.

[NinjaTrader_ChrisL]

Hi dkbyond, thanks for your note.

Unfortunately, arithmetic between two indicator values is not supported in the strategy builder. The offset setting for a value is the closest to arithmetic you can get in the builder. Any other computations need to be written by hand in the NinjaScript Editor. I attached a sample indicator for your reference. To compile and run, place the file within Documents\NinjaTrader 8\bin\Custom\Indicators and press F5 in the NInjaScript editor.

Best regards,

-ChrisL

[dkbyond]

Thanks Chris. Will give it a try.

[dkbyond]

Understood the script a little bit. Now need help on the below.


FastLine = ExpAverage(close, 20) - ExpAverage(close, 40); --> this is how as per your script Value[0] = EMA1[0] - EMA2[0]; where EMA1 = 20 and EMA2 = 40.


SlowLine = ExpAverage(FastLine, 10); ---> how do I code this SlowLine? Thanks.

[NinjaTrader_ChrisL]

Hi dkbyond, thanks for your reply.

What is ExpAverage? I'm not seeing anything in our documentation pages for this. From the looks of it, this takes a Series object and not a double assuming FastLine is a double data type variable. You will need to make a custom series and for each bar, calculate FastLine roughly:

MyCustomSeries[0] = ExpAverage(Close, 20) - ExpAverage(Close, 40);
if(CurrentBar < 10)
return;
SlowLine = ExpAverage(MyCustomSeries, 10);

[dkbyond]

Sorry my bad, it is exponential average. So I want a indicator plotting first line MyCustomSeries[0] = ExpAverage(Close, 20) - ExpAverage(Close, 40); and second line plotting ExpAverage(MyCustomSeries, 10);

Later I would want to use this indicator in my crossover strategy (first line crosses above second) in strategy builder. I will go through the information you provided, if still stuck, will come back. Thanks.

[dkbyond]

Hi Chris,

It seems what I wanted can be achieved by MACD, where (MyCustomSeries[0] = ExpAverage(Close, 20) - ExpAverage(Close, 40)) is the MACD and (ExpAverage(MyCustomSeries, 10)) is the AVG of MACD. My query is solved.Thanks.