2H time frame

is any body use 2H for trading? is that match with 4H

I don't think traders use H2 timeframe for trading, but of course intraday traders use it for trading on D1 and H4. It's an inevitable part of every daytrader to check couple of timeframes lower than your primary one, and couple of timeframes which are higher than your primary one. Well, I believe that it's possible to trade on H2, however it will be pretty difficult to do it, because there is a very little amount of traders who got used to trade on this timeframe. Everybody knows that primary ones are M1-M15 for scalpers, and H4-D1 for intraday traders.

Use whichever TF allows you to see what you need. There is a falsehood that only certain timeframes are useful.

A high time frame to get the big picture. Small timeframes provide detailed information on low risk or price. The middle time frame is for monitoring.

The time frame depends on your profit margin and the goals you want to continue trading.

No, I prefer to use H4 timeframe or D1 one.