Track sold 10 times

Hello Everybody:
Thank you in advance for reading and commenting.
First, let me tell you that I've been a POND5 member music composer since 2015 and, although I've uploaded around 70 tracks I had 6 tracks that sold once, 3 tracks that sold twice, and 1 track that has been sold 10 TIMES! Not as many sales as I'd like, considering the years that have passed, but I don't complain about it.

The thing is I'm curious about that, because the track that has more sales is one named Roman Chariots, and I don't know who buys this kind of music, what they'll use it for, and what music I should have to create according to this information, although Contributors Portal mentions the need to find the niche, is quite complicated to determine the niche since I had 10 sales of 1 track and so little sales for all the other tracks. Also, I have a lot of diversity, but considering Roman Chariots is meant to be "orchestral" and I have a lot of other orchestral music that has never been sold, I'd like to know if anyone can advise about what to do, where to find analytic data to understand what clients are buying my tracks and then get more efficient to produce what they're looking for.

Here's the track Roman Chariots Theme

Regards!

Great titling; if I were an editor, the title alone would pique my interest. Titling is super important imho.