Bitcoin started a downside correction and traded below $42,000 against the US Dollar. BTC must stay above $40,000 to avoid a trend reversal. Bitcoin started a fresh decline below the $43,000 and $42,000 levels. The price is trading below $43,000 and the 100 hourly simple moving average. There was a break below a major bullish trend line with support near $42,500 on the hourly chart of the BTC/USD pair (data feed from Kraken). The pair might correct further, but the $40,000 support is the key. Bitcoin Price Breaks Support Bitcoin price failed to stay above the $43,000 support zone. BTC extended decline and traded below the $42,500 support level. There was a move below the 23.6% Fib retracement level of the key increase from the $37,030 swing low to $45,350 high. Besides, there was a break below a major bullish trend line with support near $42,500 on the hourly chart of the BTC/USD pair. Bitcoin is now trading below $43,000 and the 100 hourly simple moving average. It is testing the $41,200 support level. It is also near the 50% Fib retracement level of the key increase from the $37,030 swing low to $45,350 high. If the price stays above the $41,200 support, it could attempt a fresh increase. On the upside, an initial resistance is near the $42,000 level. The first key resistance is near the $42,500 level and the 100 hourly simple moving average. Source: BTCUSD on TradingView.com A clear move above the $42,500 resistance might s...