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 .
Open-source script
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules.
You can favorite it to use it on a chart.
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