"It is a big game and we need the three points; everyone in that top six seems to keep winning and we just have to make sure that we do as well," he says.
"The last couple of games have been good wins, and I think we were a bit unfortunate in the Palace game because if we hadn't gone down to 10 men in the first half I think we would have got something out of that game too.
"It is the right time to be winning and it is important we make it three in a row on Saturday - there is a lot riding on it."
He says there will be no nerves as the Hammers end their Upton Park season with another must-win game and adds:
"It will be a good atmosphere and I am looking forward to getting a win; there is always expectation at West Ham so that is nothing new for the players."
Christian played midweek for Scotland against Denmark and, although he has had a hamstring niggle, he insists:
"I feel fine; I got through it okay and I enjoyed the experience of playing a team as good as Denmark with a young side.
"We took a lot of credit for it because there were so many young lads playing and hopefully the future will be good for Scotland."