Ema

[nagaraj]

I am very new to Ninjatrader and hence this may seem trivial. I am trying to develop an Indicator using EMA. The EMA should be function of a variable and period. I know the EMA function already exists and am still not able to use it. It keeps giving me an error. Can you please tell me what is the syntax for using the EMA function?

[NinjaTrader_RyanM1]

Hello nagaraj,

Welcome to the NinjaTrader forums!

You can see this link for all supported overloads for EMA:

http://www.ninjatrader.com/support/helpGuides/nt7/moving_average___exponential_e.htm

Most likely there is an issue with the type of value you're passing into it. It must be a custom data series or other indicator.

What is it you've tried so far and what is the exact message you're getting?

[nagaraj]

Hello nagaraj,

Welcome to the NinjaTrader forums!

You can see this link for all supported overloads for EMA:

http://www.ninjatrader.com/support/helpGuides/nt7/moving_average___exponential_e.htm

Most likely there is an issue with the type of value you're passing into it. It must be a custom data series or other indicator.

What is it you've tried so far and what is the exact message you're getting?

Thank you for your quick reply. Instead of High in the example below

double value = EMA(High, 20)[0];

I want to use (High + Low + Close)/3.

How do I do that?

[eDanny]

Try this:
double value = EMA(Typical, 20)[0];

Typical does equal (High + Low + Close)/3

Dan

[NinjaTrader_RyanM1]

That particular calculation is already built into the platform as Typical, so you could write:

double value = EMA(Typical, 20)[0];

If it weren't there already, you would need to create a data series for it. This tutorial can walk you through setting up an example data series:

http://www.ninjatrader.com/support/helpGuides/nt7/intermediate___historical_cust.htm

[nagaraj]

Thank you Dan and Ryan. It works and I learnt a lot in the process.