BankNifty - VWAP + StdDev Bands

- By Default the script draws Daily VWAP for Bank Nifty based on Futures Volume or underlying Index Stocks based on user input
- Optionally one may Anchor it to Week/Month etc or anchor it from a particular Time.
- It also draws 3 Standard Deviation Bands from the VWAP based on User Input.
- Optionally draws Previous VWAP Close for and Bullish or Bearish Move.
- It works with NIFTY 50 as well but only using Futures Volume(Pine limitation to number of security calls) . Please change the Symbol and Futures Volume symbol to "NSE:NIFTY" and "NSE:NIFTY1!" BANKNIFTY NIFTY