Moyes brought in the untested Argentinian Denis Stracqualursi having allowed Jermaine Beckford to join Leicester and Ayegbeni Yakubu to go to Blackburn.
The Toffees boss accepts he has no idea how the player on loan from Tigres - or fellow deadline-day arrival Royston Drenthe - will cope with the Barclays Premier League.
And with Victor Anichebe out for a couple of months with an ankle injury sustained on international duty and Louis Saha's fitness a seemingly week-to-week issue, Moyes plans to utilise midfielder Tim Cahill in an advanced role he has been pressed into on regular occasions over the last couple of years.
"We had Stracqualursi watched in Argentina last year and he was valued a lot more than we got him for - we took him for nothing," said the Scot.
"There weren't an awful lot of centre-forwards out there we could get and he became available to us at the last minute.
"In the end it was nearly worth the gamble to see how he does. We've done it before with loan signings; some have worked and some haven't.
"He has a good goalscoring record in Argentina but I'm not sure yet, we'll find out in time.
"He looks like he's got a good goalscoring record and looks like he can finish.
"But I do expect to play Cahill up front. He played up front against QPR so we will use him there.
"We have more options in midfield with the likes of Ross Barkley, Jack Rodwell, Marouane Fellaini, Leon Osman John Heitinga and Phil Neville.
"Where we don't have a lot of options is at centre-forward.
"I need to add Tim Cahill to the group up front to see if I can find a combination which can get me some goals and lead the line."
Drenthe is another player who has been on Everton's radar for a while with Moyes almost signing him on loan from Real Madrid last season.
However, like Stracqualursi, the manager has questions about the left-sided player he needs answers to.
"We don't know enough yet about Royston," he added.
"We've not seen enough, although we have seen him in training.
"We'll give him a chance to work with Bainesy (Leighton Baines) as things go on.
"At the moment we are all looking; the supporters have had the same look as I've had and we will see what we can do.
"Everyone tells me he is a terrific player. There have been questions about him as a lad at times but I've found him fantastic in the week he's been here."
Both new signings are well short of match practice but could feature among the substitutes for Saturday's visit of Aston Villa having worked hard this week.
"The two's attitudes this week have been a breath of fresh air," said Moyes.
"They've probably had double sessions this week as we try to get them into the right condition.
"The biggest thing they are lacking is match practice; one hasn't played since mid-April and the other since June and they have not had any pre-season games so that has to be a big consideration.
"Supporters have to understand it will take a bit of time to get them back [to fitness]."