Let me change my suggestion about the info of what Tickstory has done.
I think better would be if Tickstory looks up in the appropriate tester- and history-folders of the defined MT4
may only for the the Symbols (Pairs) that do have valid Tick-histories and shows what are the first and the last date. All other pairs may have no further information.
So each time I start Tickstory I will be informed on which pairs I can start backtests immediately and on which I first have to create the tick-history-files.
I think that’s better and I guess easier for you to program and it’s all we need!
Thanks Carl