[ProfitTrailer] EMA Cross Study

Support buy/sell parameters for EMACROSS strategy.
The script highlights the regions where trailing is most likely to be successful.

リリースノート:

Add proper parameters type.
Add "excluding the current candle" constraint for EMACROSS strategy.
Switch to overlay=false to better show EMA Spread

リリースノート:

Core refactoring and clean-up

リリースノート:

Bugfix

リリースノート:

Minor code changes

リリースノート:

Fix display issue when using a different resolution than the price chart