Detect the number of digits in integers and floats, before the decimal and after it.
It also works for negative numbers.
There are some rounding issues, but the currently maximum supported number can have safely up to 3 digits after the decimal point.
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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.