Is there any method available
To see how many
People place long or short from what positions on chart in crypto
The only way I know to view Bitfinex longs vs. shorts is on Tradingview. You need to load up the free custom indicator called "Bitfinex BTC Shorts & Longs." It pull the stats from Bitfinex's API. BFXdata.com used to be good for that (as well as other interesting charts) but it's down now.
For Bitmex, you can see open interest, interest rates, and liquidations here:
https://tensorcharts.com/u/bitmexstatshttps://www.bitmex.com/app/contract/XBTUSDThere is no real commitment of traders data though.