If you do not understand what short is,I highly recommend researching FINRA documentation and reporting.
The indicator looks nice in histogram and column style.
The neat thing about nesting str .replace_all is that you can get the ticker without using a mutable variable.
Sorry if I haven't replied to your message yet, I'm a bit backlogged :)
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.