S&P 500 (SPY) If cannot clear 284.50, then look for a move to around 277 is where the next major moving averages sit.
Russell 2000 (IWM) The 3/25 low was 148.41. Significant? Only if it holds. 152.50 good resistance
Dow (DIA) 253.40 is the 50-week MA. If that fails, besides IWM, it will be the second but not the last index to break that level. Resistance at 257.00
Nasdaq (QQQ) If this cannot get back over 179.85, then 174.40-174.60 is the test of the underlying MAs.