I've been using OctaFX brokers for I think half a year or so, and I’ve got no real complaints so far. It’s easy to use and I've had no issues with withdrawals. As for its legitimacy in India, I did some research before signing up, and it seems to be operating within the legal framework. However, I'd recommend checking recent reviews and doing your own due diligence just to be sure.
I’ll admit I haven't personally used OctaFX, I've heard mixed reviews from online friends who have tried it. Some say it’s reliable and straightforward, and others have some things to say regarding customer service. It must be legit (in India or otherwise), cause they’ve been operating for years without any problems. That’s my two cents.