The Caribbean hosts are on the verge of sweeping the two-Test series, after putting on 380 all out in their first innings and restricting the tourists to 104-7 at stumps on Sunday.
Roach snared 5-33, tearing through the Bangladeshi order, and the 26-year-old said he was pleased conditions suited his aggressive pace more than they did in the first Test at St Vincent.
"On a pretty bowler-friendly wicket, to go out there and hit the straps early and get some wickets against the Bangladeshis was a good feeling for me and for the West Indies as well," Roach said.
"We have seven wickets so far, and hopefully we come on tomorrow and finish the game."
Roach said he was able to vary up line and length bowling with the occasional "bumper", and he said that worked for him.
"Much more bounce in the wicket, the ball was seaming around early on," Roach said.
"I think the wicket in St Vincent was flat, it was very hard to bowl on and the guys, once they get set, it's hard to get them out. Here - they all give a chance with the ball."
Ranked 11th in the ICC's Test bowling standings, Roach said he was aiming to knock the top-ranked Dale Steyn off his perch.
"I want to get number one in the world. And to keep taking wickets, keep moving up the rankings, and keep helping West Indies win games," said Roach of his goals.