That sounds good - can you describe your set-up, what language you use to read/write the files? do you any specific frameworK/IDE?
I've played with HDF5 through it's Python
bindings (called PyTables) and found it to be
unsuitable for a tick database.
First of all, it is...
After comparing the excel sheet with tick data of the DAX. the exits look plausible.
They are just fixed brackets around the entry.
Separate names with a comma.