A gambler risks the owner’s money or assets in a game that can move in any direction, much like stock market movements. However, gambling may not be as predictable as stock market movements. Highly experienced day traders can read market movements skillfully, making their speculations closely anticipate reality. 

Day trading involves developing and implementing specific trading strategies. These strategies are based on market analysis, historical data, and testing. Gamblers, Doodle Baseball, however, often rely on instincts or simple betting systems that don't involve detailed analysis or planning.