Supporters group the Sons of Struth took to the city streets in a van with giant video banners demanding finance director Brian Stockbridge, director James Easdale and shareholder Sandy Easdale quit.
SOS supremo Craig Houston said: "We need to get our message and feelings across to the shareholders. We need to keep up a presence and keep shouting, and shouting loud, for what we believe in.
"Our latest protest last night was another success, and I would like to thank the Baillieston True Blues for their financial help.
"The fans will keep the pressure up. It is only once this saga is over and fans have trust in the people running the club that we will be able to go to matches without banners and without chanting against the board.
"The board have heard the chants and seen the banners, the shareholders must now get the message and take on board what the fans want for the future of Rangers."
Last night's protest came at the end of another tumultous week for the club with chief executive Craig Mather and director Bryan Smart following Ian Hart, who quit his non-executive position last week, out of the club.
The high-profile departures on Wednesday came just hours after the club was forced to postpone its AGM following a successful Court of Session motion put forward by former Blue Knights leader Paul Murray.
Murray, former chairman Malcolm Murray and Requisitioners Alex Wilson and Scott Murdoch now hope to stand for election at the AGM, which will be held 21 days after shareholders receive notice from the club.
Mather's shock resignation means there are only two directors remaining on the board of Rangers International Football Club plc - Stockbridge and James Easdale - following a string of exits in recent months.
South African-based businessman Dave King is keen to return to Ibrox as chairman and Houston has called for clarity from those left in the boardroom as the battle for control at Ibrox intensifies once again.
Before these latest developments, the Sons of Struth had been in the vanguard of protests against the board.
Giant banners proclaiming 'Sons of Struth demand the truth', 'It's our club and we want it back' and 'Spivs out! Let your voice be heard!'. were unfurled at the League One fixtures against Stenhousemuir and Ayr United.
Houston said: "It is important that if the Easdales want to remain part of Rangers going forward, they must let the fans, who are the most important people in this whole process, know what their plans are.
"We need to know who is behind them and not just groups of faceless investors.
"If they are the Rangers men they claim to be and are involved for the good of the club, then they must let the fans know who is backing them and what their plan for the future is. They must do that soon.
"The AGM has to be held as soon as possible so that some stability can be brought back to the club at this crucial time.
"The AGM has to come soon, the shareholders must have the opportunity to decide the make-up of the board as quickly as possible.
"The people who will decide Rangers' future are not the Easdales, Mr Stockbridge or Paul Murray - it is the club's shareholders."