According to @rovercrc, once September turns green for Bitcoin, Q4 is always mega bullish (source: @rovercrc on X). Historical monthly return data show that since 2013, September closed green in 2013, 2016, and 2023, and in each of those years BTC finished Q4 higher overall, with strong October–November performance (source: CoinGlass Bitcoin Monthly Returns). This is a small sample of three occurrences, so traders should treat the pattern as a conditional seasonality edge rather than a guarantee (source: CoinGlass Bitcoin Monthly Returns). A valid setup requires a confirmed September monthly close above August on BTCUSD to classify September as green before applying the Q4 seasonality bias (source: TradingView BTCUSD monthly data). If confirmed, the historical tendency favors long exposure into October–November while managing risk, as these months have been among BTC’s stronger periods historically (source: CoinGlass Bitcoin Monthly Returns).