Higdon scored twice at Tannadice to take his tally for the season to 24 in the Scottish Premier League - a personal best for the big Englishman.
McCall reckons Higdon is enjoying some good fortune, but believes his success this season is down to hard work more than anything else.
"When big Michael has not played well this season he has scored, and when he has not scored he has played well," McCall said.
"Tonight he did both - he led the line superbly and also scored two goals.
"He also won the Motherwell lottery, £750 today, so everything has been going for him. When we win, it's a fiver but he won £750 in a rollover. That sums him up at the minute.
"He's a terrific guy to have in the dressing room and I'm delighted he has broken his record. I'm delighted for him and the whole team."