So I created 2 functions I use all the time and now sharing them with you.
- roundn - rounds the values in its first argument to the specified number of decimal places.
- roundtick - rounds the values to current symbol mintick
I hope they will be useful for you.
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.