Binance Alpha new coin launch detector. Uses WebSocket to monitor !miniTicker@arr stream and detects new trading pairs immediately when they appear. Maintains known symbols set in memory and triggers alert for new symbols with valid opening price.

币安Alpha新币上线检测器。通过WebSocket监控!miniTicker@arr流，实时检测新出现的交易对。在内存中维护已知符号集合，当出现具有有效开盘价的新符号时触发告警。