And about the bar aggregation...
Let's check the source, the data. Charts are build based on data.

5m data downloaded directly from FXCM (timestamp is a bar open):
02-08-2018,12:50:00,1.2224,1.22269,1.22183,1.22223,2566
02-08-2018,12:55:00,1.22223,1.22371,1.22206,1.22363,2913
02-08-2018,13:00:00,1.22363,1.22398,1.22342,1.22381,2626
02-08-2018,13:05:00,1.22381,1.22535,1.22368,1.22509,3210
02-08-2018,13:10:00,1.22509,1.22548,1.22458,1.22517,2382

5m data aggregated by Zorro (timestamp is a bar close):
[1030: Thu 18-02-08 12:50] 1.2217/1.22251.2215/1.2224
[1031: Thu 18-02-08 12:55] 1.2224/1.22271.2218/1.2222
[1032: Thu 18-02-08 13:00] 1.2222/1.22371.2221/1.2236
[1033: Thu 18-02-08 13:05] 1.2236/1.22401.2234/1.2238
[1034: Thu 18-02-08 13:10] 1.2238/1.22541.2237/1.2251

I don't see any problems. You can check it by yourself but use the latest version of Zorro