Hey guys, I was trying to figure out how start with TD Ameritrade's API to experiment with some algorithm trading, and found little to nothing. By piecing together a few YouTube videos and guides from reddit, I created a 12-page (yes, 12 pages worth of stuff to even get started with their API), step by step PDF guide and listed it on this website I just threw together: https://btbtrading.wordpress.com
Its totally free on Gumroad: https://gum.co/XKxGc (pay what you want, minimum amount is $0), so if you have been looking to get started with algorithm trading with TD Ameritrade and hit a dead end, look no further. This guide is for you.
Let me know what you think!