All the monthly standard option expirations dates along with an option to specify a marker for X bars before. This can be used for people to mark expiration week (5 bars) or 21 days (15 bars) to expiry.
Works only on daily chart .
Category is difficult with this one. I chose ROC as the closest as this measures the historical % of a given change amount.
This indicator is in a separate panel above or below the main chart. I use it only for Options trading to help with probability reckoning.
Use it (at your own risk) and the code freely and please...