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.

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.

Shady site Shady site not sure if the team behind are trustworthy with holding your algos data. I found other frameworks like backtrader that are easier to pick up and get working with quickly than LEAN. LEAN is poorly documenting making learning a huge hurdle. Also, I question the stability of their site because of the amount of bugs you can find in their UI and some that I encountered in plotting during backtrading. If you need an online IDE, Quantopian is far more reliable and documented and quicker to work with but still could have issues with data privacy.

Accelerator of analysis! Really nice platform to boost your algorithmic trading.