Crypto expert @CryptoNobler has issued a warning that the altcoin market is about to experience a significant surge, potentially starting as early as April 21. According to Nobler, the recent occurrence of a Golden Cross on the altcoin market signifies an impending bullish rally. This phenomenon occurs when the 50-day moving average moves above the 200-day moving average, which indicates a shift in momentum favoring upward price movement. His prediction is based on historical data, as during previous instances where a Golden Cross occurred, there was a massive 200x surge in the market within just three weeks. This pattern suggests a strong possibility of similar gains in the near future.