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 .
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 publications is governed by House rules. You can favorite it to use it on a chart.
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