tradingview extracting real-time price feed and historical data

I would like to explore how we can extract real-time price feed from tradingview charts and historical data so I can do some testing of strategies.

It should be able to extract historical data in various time horizons (eg. M1, M15, H1, H4) and at the same time, extract real-time price feed so that new bars can be created based on OHLC (open high low close).