Forrester was on target for Rangers in their 4-3 victory over Queen of the South at home in the Scottish Championship on Saturday afternoon.
The attacking midfielder found the target in the 14th minute of the encounter at Ibrox in Glasgow.
Warburton was impressed with the performance of the 25-year-old former Aston Villa prospect and raved about him after the match.
“It was a good goal and I’m pleased for Harry,” the Englishman told Rangers’ official website. “He’s done so well, a technically gifted player, and he wants to play football. He reminds me of a street player, playing in the playground, that’s what Harry is about.”
Warburton, though, was disappointed with the fact that Rangers conceded three goals against Queens at Ibrox.
“Most disappointing for us as a team is we had a run of games, seven clean sheets in nine, when we were very hard to score against,” the former Brentford boss told Rangers’ official website.
“As a group in there, not a defender or a defensive unit, as a team we’ve let six in two which is not us, that doesn’t happen.
“So we look at it and analyse it and we’ve got to be tighter. But we had a really good run and we take pride in scoring goals and we take pride in defending our goal.”
Rangers are at the top of the Scottish Championship table at the moment with 75 points from 30 matches. The Glasgow giants are 14 points clear of second-placed Falkirk and have a game in hand.
If Mark Warburton’s side win against Raith Rovers away from home at Stark's Park next weekend and Hibernian fail to pick up all three points against St Mirren at St Mirren Park, then the Gers will clinch the Scottish Championship title.