The order of the FIR-filter

Hello, Francois!
The FIR-filter order is extremely high (7252), which could result in numerical errors as well as a considerable delay of filtered data (in the order of seconds).
Why choose this order?
I am looking forward to your reply.
Thank you!
Lu Zhouimage

Why choose this order?

To be precise in the frequency domain.
We recommend filtering the continuous files, not short epochs.

@hossein27en This is a question for you.