TD Ameritrade $AMTD is demonstrating some bullishness as price breaks above some key resistance factors. But another major one is just ahead.AMTD Daily Chart(click to enlarge)Breakout:- As we can see on the daily chart, price recently rallied from a low on the year under $48 to $51.50 area. - Then, price held under $51.55 for a few weeks. This area proved to be a key support/resistance pivot.- During the 7/22 session, price finally broke higher.- Price also broke above the cluster of 200-, 100-, and 50-day simple moving averages (SMAs) along with a falling resistance.Next Resistance:- While the break above $51.55 was a key one, it might be a premature bullish signal.- There is still key resistance in the $53.50-$54.15 area. - I think if price starts to hold above the $51.55 area and treat it as support, we can have more confidence of the bullish outlook.- But for now, we can say that the market might be shifting from a bearish to a sideways mode.