Bind mouse key to continuously send clicks
What mouse brand? Some mouse brands provide macro software to individuals for games mostly. 

Logitech Macro Software(G-SERIES ONLY):

http://support.logitech.com/en_gb/software/lgs

Razer Macro Software:

https://www.razerzone.com/synapse

The ones I've used are those and they allow you if you have one of their products at bind, change and macro at ease.

THERE IS ALSO KEYBOARD MAESTRO, don't need any exclusive product(never used this before, use at your own risk):

https://www.keyboardmaestro.com/main/