According to The Stock Sniper (@Ultra_Calls), SPY displayed a 'fat stick,' indicating a significant bullish candlestick formation on June 18, 2025. This pattern suggests strong buying momentum in the S&P 500 ETF, which could attract increased short-term trading activity and potentially serve as a leading indicator for risk-on sentiment in both traditional equities and correlated crypto assets such as BTC and ETH. Traders should monitor SPY volume and price action for confirmation of continued uptrend, as large moves in SPY often impact overall market liquidity and can influence crypto volatility (source: @Ultra_Calls on Twitter, June 18, 2025).