S&P 500 hits its 10-day moving average, levels to watch The index is up over 1.25% at time of writing, just minutes after the open. The index is just a fraction under its 10-day moving average, which is a downtrend resistance line proxy. A breakout above the 10-day, last at 1378.09, would be bullish. A failure to break out above this level would be equally bearish. Resistance above the 10-day is at 1384.87. Support is currently at 1371.39.