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.

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.

Recommended I have been programming on my bot for over 2 years. In the beginning it was difficult to get to know the platform because there is a lot of possibilities coming at you. But once you understand how this platform works and were to find the information. It's a pleasure to work on your bot. Pros: - Strong community that mostly answers your questions in 24h or max 48 hours. - Working locally or on the platform - Possibility of coding 100% your own strategy - Live Trading with a lot of markets (Equity, Crypto, Forex, Futures). - They listen to proposals to improve the platform and take immediate action. - If using the bronze membership your getting professional help within an hour. (It's normal they charge an amount for the professional help, nothing is free these days.) - Implementing email, sms, telegram messages, ... of the orders the bot is making. Cons: - If u have zero experience programming in Python or C# it's hard to program your own bot despite their learning center. - Maybe an app on the cellphone would be nice. So you can check your bot/code anytime you want (not would be something extra). A tip: Keep persevere once your bot is trading live it's a reward for all the hard work.

Amazing platform Amazing platform! Simple to use. Gives you all the financial datasources you can think of at your fingertips. The ability to create unlimited algorithms. Creating algorithm takes just a few lines of code. Connect your favorite brokerage firm in minutes. Deploy in minutes. Great support and documentation. If you are not sure how, just ask Mia, there new chatgpt like tool, that will write the code for you or answer any question you may have.

Have been using QC for 3 years Have been using QC as an individual for 3 years, has been a smooth and consistent experience the entire time. Quantconnect makes building a trading algorithm highly accessible to anyone with an idea and a bit of coding knowledge. Handling all the background infrastructure for you, they make it easy to build your algorithm, backtest against market data, and even deploy it live with a supported brokerage. Sometimes it can be a bit difficult to learn the syntax and what a method does, but there is a lot of documentation available, as well as community forums. All this has really helped me focus on my strategy rather than building infrastructure from the ground up and I would definitely recommend them to anyone looking to try out quant finance or algorithmic trading.