Affirm (AFRM) stock is in a crowded fintech sector that can make it hard to stand out. The stock suffered a 7.3% haircut on Thursday and fell 3.6% Friday, but before that late-week drawdown, flashed a bullish signal on the charts. Better yet, AFRM’s sentiment backdrop has plenty of contrarian angles to monitor.On Wednesday, Affirm stock closed above its 50-day moving average for the first time since Sept. 24. Going back three years, this “crossover” event has occurred six times, after which AFRM has average ...