Stockcharts is my charting site of choice for doing next trade chart pattern research.
As for TD ameritrade I also am very upset they are removing trade architecture. To the point I'm researching other broker trading platforms. For a possible switch.
Think I'll ad a little about the subject of How I do homework to choose next trades.
I use FINVIZ to find stocks and patterns I like. Then take those chosen to StockCharts to evaluate those patterns.
Once video is started; CLICK youtube logo to see full screen !!!
This one finds potencial
This one is LONG and at times confusing. But well worth the time to understand how I personally evaluate a chart. The first 10 minutes is less important as to using TA & charts.