Does this take into account the number of clients each broker has. If a broker has 100 clients, that broker would have more complaints compared to a broker with just 10 clients.
This thought also crossed my mind.... However, no. of clients doesn't really make the difference.... If you have an issue, you would always inform your Broker at the first instance..... If and only if they do not resolve the issue, you would register your complaint with Regulators.....
Case in point - Sharekhan - it definitely has higher no. of clients than most of the Brokers mentioned in that chart - but it still doesn't figure in Top 10 with regards to complaints..... (It's another matter that I haven't had a pleasant experience with them)....
One more point - you should also look at the nature of complaints filed against these Brokers...... You would find that a lot of complaints against IIFL is of Type IV and VI which deals with Unauthorized Trades/Misappropriation.... This definitely is the worst of worst Business Practices....