A leading trader said that a dozen or more of the traders were working as a group and were challenging the council’s policy through a solicitor.
Debbie Wyke’s butcher’s stall has been in the market hall since the 1940s.
She said: "As far as I’m aware I don’t think anybody has agreed to sign the lease yet because of the six-day trading.
"I won’t be signing it until it’s sorted. I understand they want to trial it, but that should be optional. I have no problem with working extra trading hours, but I’m not prepared to work six days a week, even on a trial basis.
"We have not even been consulted - we had a market traders' meeting a few months ago and I'm still waiting for the issues to be answered. They’re adamant that they're going ahead with it, so it's a bit of a stand-off. They face evicting the people who will stand firm and not sign the lease. Are they prepared to do that?"
Another said: "All the traders I know are very upset with this lease. To fine someone who isn’t opening up for work is ridiculous. They are not managers telling their employees what to do, these are all sole traders. I know of two quite considerable stalls who are ready to walk and won’t sign the lease. That's in addition to the shoe stall and pram stall that have already gone.
"If they force things through it could become even more empty. But they want people to sign up by October so it's very close to deadline now."
Embattled Hyndburn’s markets chief Marlene Haworth has issued a passionate plea in a bid to stop market traders shutting up shop for good.
Councillor Haworth has assumed personal responsibility for overseeing the market hall development, in tandem with consultants Quarterbridge.
Council leader Peter Britcliffe has had to take a back seat in negotiations after declaring an interest because a family member owns a business in the market.
In a letter to traders, Councillor Haworth wrote: "On a personal note I have dealt with the market hall traders for some five years now and I thought I had done enough to earn their trust. This is not and never has been a dictatorship, conspiracy or bullying tactic.
"Most of the decisions made have been with the traders' knowledge and input.
"I am saddened that they are against giving the six-day trading a go but I have been charged to look after the council’s investment and I will continue to do that for as long as I have the Cabinet's support.
"I still hope that the traders will rethink their position and go along with the trial, I would hate to lose any of them.
"I still believe that we can all work together to make shopping in Accrington a great experience for people."