I have been using QuantConnect for over… I have been using QuantConnect for over a year now. I started out using their free tier, which basically lets you do everything that you need to do to get started and more (coding, backtesting, access to historical data). Due to this I was able to learn how to use platform at my own pace without feeling pressured by any fees or costs. When I first started the documentation was still pretty spotty and it was difficult at first but I have always received fast and detailed replies by their staff and other community members, they have since improved their documentation and I have improved from being a beginner on the platform to being one of the helpful community members, I couldn't be happier with how QuantConnect and my own trading journey is evolving!

I wasn’t a programmer I wasn’t a programmer, took a python basics course on youtube and their free bootcamp course and I was surprised how quickly I picked up object oriented programming and algorithmic trading coding on their platform. The stocks data is free up to seconds timeframe, after a long research on competitors I choose quantconnect and it was up to my expectations.

QuantConnect is an amazing service!!! QuantConnect provides an amazing service with their data and servers and the ability to run algorithms as if I were a hedge fund. I wouldn't be where I am without QuantConnect!!!

Complex, difficult API, slow backtesting Extremely slow backtesting and very complex APi with bad documentation - be ready to spend many hours trying to understand the overly complex API that is changing all the time. And did I mention that support costs? So if a anything is complex you won't get answers from the staff unless you PAY them. I give them 2 stars as they have reasonably reliable data. The platform itself is only worth one star. note: if you ask about slowness or any other thing negative on their forum they delete the posts.

This is a pretty unique business This is a pretty unique business. I've learned a lot as an investor just creating and running simulations here. I really wish these folks the best and hope they can continue to grow and thrive.