{"symbol":"BTCUSDT","interval":"1h","price":76050.7,"signal":{"action":"BUY","strength":"moderate","confidence":55,"score":1,"details":["RSI leaning bullish (36.1)","EMA9 < EMA21 (bearish)","Price near lower Bollinger band"]},"preview_note":"This is a free preview (rate-limited). Full indicators + confidence scoring at /signal/:symbol ($0.01 USDC via x402).","key_indicators":{"rsi":36.05,"ema_trend":"bearish","volume_ratio":0.3}}