Look at the weekly EURUSD charts bellow. One is from Metatrader and other from Prorealtime (a professional data supplier).
Pay attention on the line @1.2149 where I think will be a reverse Up. As you can see that line is on a very different place on MT4 giving an idea that a resistance as been broken when in fact the reversal will be above the resistance line. Also I have notice very different results on trendlines.
Weekly chart from MT4:
Weekly chart on Prorealtime: