I'm not specifically familiar with Hot Trader and as it's not officially listed on our 3p software page, it's unlikely that eSignal will directly feed that app.
However, per this spec page on Paritech's site, it would appear that you simply need an ascii file to update the daily data files. You could experiment with exporting ascii data in Advanced Charts or if you have the eSignal Data Wizard, that may do the trick as well.
May also want to contact Paritech or the 3p directly for addt'l assistance.
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