In an attempt to perform appropriate backtesting, I've started obtaining Dukascopy tick information as explained here https://www.cliqforex.com/general-fo...-prophets.html
(ie using the tick data downloader, and then importing to mt4 utilizing Tickstory)
While the majority of the historical data seems to make sense and is similar to that available elsewhere, two or three points stick out. One illuion is 28 March, 2007. Here it's determined by the 15minute chart; enormous tails, and quite different from the mt4 history centre information.
How do I verify if this information is accurate?