1. Is there any broker apart from interactive brokers using which I can buy stocks from Indian market ? 2. I am confused about margin requirement - for example if I want to sell deep OTM put - 40 strike price of dow (which is currently at 49$) that is 30 days away - how much margin I need from broker? I believe as per reg T, I have to keep 50% cash for total requirement correct? Is there any website that has handy calculator? 3. I am not sure between tastyworks vs TD ameritrade - please suggest and why? 4. Apart from this forum what are the other online places like forums/twitter handles etc ?