In a game of
Tennis or
Four square or
Ping-pong or some similar such game with
drop the ball and lose style rules, an unusually long session of hitting the ball back and forth without any points being scored will often be referred to as a
rally, i.e. "That was a good rally."
In a vaguely similar sense, on the Stock Market a rally is when the market manages to temporarily trap itself in a feedback loop of driving up prices; people notice stock prices are going up a bit and start buying in hopes that the stock prices will keep rising, causing the prices to keep rising because more people are buying, causing more people to want to buy, until everything just snowballs and a couple hours later the entire market is significantly better off.
Rally is also the name of the lead character from Gunsmith Cats, the tall one with absurdly good aim.