Following Fed Chairman Powell's speech today, the SPX rallied up to its downtrend line on the weekly timeframe, as shown on the following chart.
As I mentioned in my post of August 21, the SPX is still in a technical weekly downtrend until it makes a higher swing high and swing low. So far, it's made neither.
Its 50 and 200-week moving average zone of support and resistance is narrowing. A breakout/breakdown and hold above/below either moving average may forecast a longer-range projection of trend on this timeframe.