Idea : Idea of script is getting the volume of index BNF and NIFTY50 ( as Tradingview don't provide the volume information of the indexes )
How it works : Script works on getting the weighted volume of underlying stocks and the plotting them by weight in volume
Benefits:
1. Can server as example how, once can plot the mixed volume of symbols
2. Will help the traders who consider volume also as decision making factor while trading BNF from tradingview chart
3. Can give volume information on any TF [ intraday spread charts are not available in trading view ] **in my knowledge only available for premium users
Important factor to note: Weight of stocks may change time to time depending on Exchange decision.