The Millers' form has hit the buffers in recent weeks as they are on a five-game winless run, but they have created enough chances to win the majority of those games.
Saturday's draw against Colchester was a case in point as they wasted a number of chances to put the game to bed before being pegged back by a last-gasp leveller.
Bradley is staying upbeat, though.
"We were down at the weekend, we should have won," he told Press Association Sport. "It is always difficult when we haven't won for a while but we are trying to stay confident and trust ourselves to win the next one.
"I think we have had a bit of bad luck if I am honest. I think we are still playing quite well, in a lot of games we have dominated and failed to score and then we seem to be getting punished for little mistakes and you get those spells in seasons.
"Even the midfielders and defenders are missing chances, it's just not the strikers.
"We just have to keep the confidence to get in the right areas and hopefully the chances will go in.
"Hopefully someone will be on the end of a hammering, we are not playing badly, it's just down to luck and being punished for our mistakes."