Great technology, accessible team, invaluable supporters of the ecosystem QuantConnect has been an invaluable partner for my personal trading and for a university class that I teach. The community is incredibly supportive, and the leadership team are accessible which is almost unheard of in trading platforms these days. In my class, my graduate level students have been able to personally engage and implement constructs like Fama French factors, and QuantConnect has been an active supporter to facilitate my students learning. It's incredible to join the community, have access to a variety of detailed trading algorithms, instructional videos, and see my students feel confident implementing week-to-week. I don't think there's anything like QuantConnect out there today, and I'm a big supporter of their efforts. I can't imagine my own trading or teaching my class without it!

Making Quant Analysis and Trading accessible to everyone I knew about QuantConnect when I was desperately searching online for Options Historical data in the US markets. Everything else I found was expensive and required me a lot of manual handling. Not to say they weren't realistic at all (i.e. didn't consider company splits, adquisitions, etc.). QuantConnect and the open source lean framework made it very easy to implement trading algorithms (with a results very close to what I get in Interactive Brokers; including fees, splits, dividends, option assignments, etc.) at a very cheap cost (you just pay for the cloud computing resources). Being open source makes it very easy to figure out how to do things, however, they have interactive tutorials that will prepare anyone with basic development skills to implement real-live trading algorithms. Not to say the community is awesome and very helpful. QuantConnect is easily escalable for both small individuals and large corportations. Many organizations and hedge funds use it for their analysis and live trading.

I've been using it for around 6 months I've been using it for around 6 months. My bot is not ready yet, but it's still my best choice for these privileges: 1. connection with the interactive brokers 2. easy to use Python 3. Real market data is available 4. many built-in Python libraries. I will add here that I started a very nub in coding, and it is not easy to begin there, I mean things like data collection, especially for futures (I still haven't tried Options so far). With the help of CHatGPT which also knows the QuantConnect environment, it is now possible to code my own professional strategy for trading,

Quantconnect is a great resource for quantitative strategy deployment Quantconnect is a great resource for the deployment of algorithmic and quantitative trading ideas. Once a user is familiar with the event-driven architecture of the trading platform, bringing strategies into action which align with a trader/investor's view of the financial markets can be carried out with great efficiency. The documentation for the trading platform is comprehensive and helps with strategy tuning. Then there's backtesting and optimization which are pretty great to tinker with, amongst other resources user can interact with. Sometimes the website is slow, but never for a prolonged period, however it is still a nag. Overall, I'm delighted with the product; looking forward to more deployments and engagements with the community!

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.