EMA Description Needs Updating

[DerekMelchin]

Expected Behavior

The description of the EMA indicator mentions that the only way to warm up an EMA is to use all of the historical data for the security. This is because the EMA doesn't calculate its value from just an internal look-back window (like SMA). Instead, some information from all of the historical bars pumped through the indicator stays within its calculation formula.

Actual Behavior

The description of the EMA indicator doesn't mention that the only way to warm up an EMA is to use all of the historical data for the security. As a result, the EMA indicator reference page doesn't mention this limitation.

Potential Solution

Extend the description of the EMA indicator so that this limitation shows up in the docs.

Reproducing the Problem

View the EMA indicator class definition & comments.

System Information

N/A

Checklist

• [x] I have completely filled out this template
• [x] I have confirmed that this issue exists on the current master branch
• [x] I have confirmed that this is not a duplicate issue by searching issues

• [x] I have provided detailed steps to reproduce the issue