I’ve noticed that on Thursday, 13th of April, Savills (ticker symbol SVS) is shown on PRT as having closed up for the day. In reality, checking with other sources, the stock closed down 2% that day. This has caused the whole chart to move down slightly because the data still assumes a correct closing price of 929p, but because it thinks the stock closed up almost 0.5%, it forced all other bars to move down.
Hope this makes sense and looking forward to a correction of this issue.
Thanks,
from8to800