The Villains sit four points clear of the drop zone following wins over QPR (3-2) and Reading (2-1) and defender Clark feels their form is good enough to continue on and kick clear of the bottom three.
"The last two weeks, we have had some good results. It's always nice to come away after having two good results like that," he said.
"It would have been a lot tougher if we had come away knowing we had lost two games. It's always a big confidence boost when you have won two games like that.
"The belief has always been there with us, it's just been about getting the results and hopefully we can start to pick up now.
"From 10th place to the bottom, it's still very tight. With seven or eight games to go, there are a lot of things that can happen still and a lot of teams that can get sucked into it."