Start with your workflow
List the markets you follow, the timeframes you use, the alerts you need, and where you review charts.
Check the data
Confirm exchange coverage, real-time versus delayed data, extended-hours support, and any additional data fees.
Test the charting basics
Build your normal layout. Add the 10/21 EMA cloud, Volume Profile, RSI, and the 50/200 SMA. Then see whether the result stays readable.
Price the full stack
Include the plan, market-data add-ons, alert limits, and any separate broker or research subscriptions.