Brad Marchand’s postseason hands started cold, then got hot and are now frigid again. But the Bruins winger says his current slump — no points in five Stanley Cup finals games against the Chicago Blackhawks — is different than when he recorded there assists without a goal in the seven-game Eastern Conference quarterfinals matchup with the Toronto Maple Leafs. “I mean, pucks aren’t finding their way into the net and I’m not making many plays,” Marchand said yesterday in the Garden dressing room on the off day between Saturday night’s Game 5 loss in Chicago and tonight’s Game 6. “So I just have to be better.” Marchand’s struggles continued in Game 5, including landing just one shot on Blackhawks goalie Corey Crawford in the B’s 3-1 loss that left them trailing 3-2 in the best-of-seven series. Back during the series with the Maple Leafs, Marchand said he was having a conflict of confidence. He picked up his play toward the end of that series and assisted on Patrice Bergeron’s series-winning goal. That confidence kept rolling through the next two rounds. He torched the New York Rangers for two goals and six points in five games in the conference semifinals, then clobbered the Pittsburgh Penguins with two goals in Game 2 of the Bruins’ four-game sweep in the conference finals. Coach Claude Julien would like to see Marchand quickly improve to help keep the season alive. After all, Marchand was one of the go-to scorers for the Bruins with 18 goals in 45 regular-season games. “Well, if he’s going to be a streaky player, I would hope that streak starts (tonight),” Julien said. “I don’t think he’s played terrible, but certainly he knows he can be better. And a lot of our guys do, too. We all need to be better in order to get ourselves back into this series here. And we feel confident that we can. “You go through bumps along the way and you fight through it and you just have to look at the other team, they have guys that hadn’t produced and they started producing. So if we can do the same thing, then we’re going to get ourselves back into it.”