Volume profile
Volume Profile shows HOW MUCH traded at each price, not just when. Key concepts: POC (point of control — most-traded price), Value Area (where ~70% of volume traded), and HVN/LVN (high/low volume nodes).
Price tends to move quickly through LVNs and stall around HVNs/POC. Auction Market Theory reads this as the market seeking "fair value" — powerful for context, though it needs volume data your broker may not fully provide.