Bitcoin might suffer from a pullback for two weeks or longer, though the crypto has rallied almost 40% so far this year, according to Katie Stockton, founder and managing partner at Fairlead Strategies. The cryptocurrency saw a new short-term "sell" signal from the TD Sequential model, a technical indicator that identifies the exact time of trend exhaustion and price reversal, Stockton wrote in a Thursday note. The signal suggests that bitcoin has been overbought for the short term, and it incre