This is my experience with IC Markets.

I opened several accounts with this broker, and recently I managed to get $11,000 profits from one of my positions. Naturally, I want to withdraw the money. So, I fill out the requirements and wait for their answers. However, they somehow blocked me and nullified my account. At first, I thought this might be a mistake, there is no way they would do that without reasons, right? So I contacted their customer support, but I only got mediocre answers. They told me that my contract has been dissolved and that all of the transactions has been canceled. As a result, I couldn't get my money and I lost all of my deposits! How it is possible to cancel transactions on the STP and ECN technology? Are they really STP and ECN brokers? This is insane!

I did go to the regulator, but I'm not sure it will give me anything. But, again, this is MY experience. Others might be different.