I have Oanda json historical data file from November 2023 through April 2024, and I have an Oanda json historical data file from March 2024 through June 2024.  When I import both data sets, first the data set from November 2023 through April 2024 and then the data set from March 2024 through June 2024 into EA Studio I notice they do not concatenate so that I would have  historical data from November 2023 through June 2024.  Oanda only provides last 3 months of data so I have to collect data every few months and store in separate files on my computer.  How can I combine these data sets so EA Studio can create strategies from November 2023 through June 2024? Combining the two data sets does not have to be done in EA Studio.  I am just wanting to know if there is a way to combine two json historical data sets into one data set.

Alan,