DIA (Dow ETF) levels are extremely well-defined. A massive top is completed and the biggest level on this chart is 297.50 (or so). A drop to that level would represent a 20% drop from the all-time high. In the grand scheme of things, that’s fairly normal. Possible trading levels before then include 313.50 (VWAP from the March 2020 low) and 332.70 for resistance (former support). The full view of the structure from the 2020 low is shown below.