Can I run EA on MT5 Custom Symbol? (Here's a detailed description.)

[NAThunder]

Question 1.

MT5 has Custom Symbol.

Can I use EA here?

Question 2.

I understand that the offline chart of MT4 cannot run EA because there is no tick data. (Of course, we could do some extra work......)

Is there tick data in Custom Symbol of MT5?

My poor English may not have explained well.

Thank you so much for your answers!