According to @52kskew, FOMC-driven volatility has mostly passed, and Quad Witching on Friday, September 19 typically impacts liquidity and raises volatility risk in traditional markets with potential spillover to crypto, source: @52kskew on X, Sep 17, 2025. For crypto, the upcoming 4-hour closes and the subsequent weekly close are critical to watch, source: @52kskew on X, Sep 17, 2025.