20% MTM requirement ?

Hi,

I got 20% MTM email recently.

 

#1. Do we have to maintain 20% on intraday also ?

#2. Zerodha and other brokers do not ask such a thing. Why FYERS moving with this margin move.

#3. already for MTM over night , we were asked to maintain 50% cash. and given a freedom of using 100% at least on intraday ?

 

Why margin is changed too frequently. I can't change broker very often. If you want me to switch broker. mention it. I will simply change the broker. who provide 100% margin at least on intraday.