HELP! Metatrader data corrupted

After problems re- registering for a demo metatrader account( servers were not responding), my data charts have gaps and somehow ohlc has become corrupted.
This very frustrating as Its hindering my backtesting, any help from a metaguru will be greatly appreciated.

thanks.

Don't know if it's related but my mt4 alpari demo account just crashed... One of my trades hit target and boom everything crashed and my closed P/L is now 262 243 234 082 396 570 000.00 (wow I wish that was real).