According to the source, BTC has reportedly closed above $100K for 163 consecutive days; source: public X post dated Oct 18, 2025. Traders should verify the claim using the CME CF Bitcoin Reference Rate daily close and cross-check with CF Benchmarks methodology and aggregated exchange OHLC data; source: CME Group and CF Benchmarks. If confirmed, a sustained streak above a round-number threshold indicates durable trend support near $100K and informs stop placement and risk sizing; source: Glassnode market structure research and Binance Research on psychological price levels. Positioning cues to monitor include spot-perp basis and funding, CME futures term structure, and 25-delta options skew and open interest concentration around $100K strikes; source: Deribit Insights and CME futures data. Key risk trigger would be a daily close back below $100K alongside basis compression into backwardation, which would signal momentum deterioration; source: CME futures and Kaiko derivatives market data.