Round numbers above and below

Place round number lines by step amount above and below bar

リリースノート:

Fixed auto-scaling issue

リリースノート:

Added lines within current bar as well

リリースノート:

Reverted scale modification since it was buggy

リリースノート:

Restricted to forex pairs for now since the step values are different for different asset types

リリースノート:

Reduced default nuumber of lines to help with scaling issue