One of the problem I have with FX data is: there is no ONE set of data that everyone uses the same. You see, this is a market marker market (mostly), however efficient the market is, there will still be some discrepancy among different market markers (brokers), so the charts we see in one platform - especially those in smaller time frame, may not be exactly the same as the other.
To add to that problem, somehow the same platform may change the data a little if you load the chart at different time. Though it does not occur frequent enough, it does bother me.
Take for example this same USDSGD chart. Notice that that candle mention previously is now no longer a hammer. Anyone has the same problem?
(Yes, I have check the time zone in the horizontal axis).