Rise over run on EMA

[techdoodle]

Hi.
How easy is it to script an EMA to change color with the user's input of rise (price change) and run (n bars)?

For instance a threshold of ascent and descent can be established by user input, and then the EMA can change green or red accordingly.

Basically, a slope ratio is established.

I don't know anything about scripting unfortunately , but I thought is would be a great indicator for just about anyone .

Thanks!
-techdoodle

[NinjaTrader_AdamP]

Techdoodle,

This wouldn't be that difficult. The issue would be to define over how many bars you want to calculate slope. For example, you may get flip-flopping signals if you only calculate slope over 2 bars. Its probably better to do a slope over several bars. There are rules defined for this known as "differential quadrature" or "numerical differentiation". Basically, a derivative at some point (from calculus), is slope.

Please let me know if I can assist further.