The Reds are just four points adrift of city rivals Everton, who currently occupy the final Champions League qualification spot, with back-to-back home matches against Aston Villa and Fulham to come.
While Anfield has not been the fortress manager Brendan Rodgers wants so far this season the Reds have won their last two there to take their tally to 12 points from eight home matches.
And with Sunday's victory at West Ham being the first time since last December Liverpool won successive league games there is a feeling momentum is building.
"It's important to get back-to-back wins," said Johnson, who has been one of the Reds' players of the season so far.
"We've probably played a lot better than our points total suggests this season but it's great to now have two wins on the bounce.
"We've got a week now to prepare for the next game and we have a couple of home games to come so we can really try to push on and climb up the league.
"It's a tight league. Anyone can beat anyone these days so you have to be on top of your game no matter who you are playing.
"That's why it is one of the best leagues in the world. No-one can guess what is going to happen."
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