Are volatile currency pairs good for scalping?

I think there is no broker out there with low spreads (close to almost zero) and zero commissions. You’ll have to search for low spreads and a low commission broker. That’s what I did. Found turnkey forex, spreads are low (just like your broker) and commission charges are only $2/100k RT.
Better look for such brokers. You‘ll find many names here: going offshore to escape CFTC.