Yes - this only occurs on IG MT4 charting.
I have other broker's demo MT4 accounts which have nothing like this data spike on ***JPY pairs.
Can IG please clan up this dirty data so my ***JPY pairs become functional again for charting purposes.
Glad I wasn't short any of these in live trading 
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Data corruption in xxxJPY pairs (the quote currency)
in IG Technical Support - Platform and App Help
Posted
On 23rd march (depending on timezone) a corruption of data occurred in some currency pairs of the JPY quote currency.
I am sure I am not the first to ask this question on the forum, so if this has already been answered and a solution offered, I would be pleased to be so directed.
However in the absence of that, I should point out that the GBPJPY and USDJPY quote dat is corrupted.
How can I clean this data from mu computer?
I have tried several things such as deleting cache and old charts, refreshing MT4 build etc etc, to no avail.
The issue is messing up my charts 7 weeks later.
Is this such a trivial issue that the powers that be don't feel it is worth assigning personnel to fix the issue? REALLY?
Rasoir
Newcastle NSW Australia.
PS - This is NOT my first post on this forum - would you please stop "approving"my posts every time I log in here to post on an issue.