Members of Red shirts will mobilise to venues parallel to where the multi-coloured group gathers starting Wednesday, UDD leader Natthawut Saikua said on Tuesday.
"If the multi-coloured group gather at the Victory Monument, we will rally at the Democracy Monument. If they go Chatuchak park, we will go to Lumpini park.
"If the multi-coloured group can do it, so can we," Mr Natthawut said.
He also said the government must adopt the same standards when they are used against the red-shirts and other groups.
"If Mr Abhisit [Prime Minister] want to crack down on us, why doesn't he crack down on the multi-coloured people?," he asked.