Moving Gain Loss Percent

Tracks the percentage gain/loss in three ranges:
* single candle (can be turned on or off)
* custom range of candles
* custom range of candles


For example, with a range of 3 candles, and the serie:

*1 - close 10
*2 - close 5
*3 - close 20

The moving gain would be:

*1 - close 10 - gain 10, infinite%
*2 - close 5 - gain 5, infinite%
*3 - close 18 - gain 8, 80%

Or, for example if the range is 12 candles on a monthly chart, then the result is the Year-To-Date gain/loss plotted as a percentage.