Francesco Becchetti completed his takeover of the O's earlier this month and Slade revealed he is still in the market for a number of fresh faces to strengthen his playing squad and aid a push for promotion.
Slade told the Epping Forest Guardian: "We're trying to add to the squad to give us a little bit more strength and I think that will be a lifting factor as well.
"If we can strengthen the squad in the coming weeks before the start of the season, then I will be delighted and I'm sure the lads that have been with us for such a long time will."
He added: "I'm not sure being fifth favourites [for promotion] is a fair reflection. Certainly if you looked at the financial table, we wouldn't be anywhere near the top half. But we've got a good team and group together.
"If there are a few more pennies available to sign a few players, that will help."