What makes you gain/lose momentum in smash and other fighting games?

[JingleJangleJamil]

I want to know what in smash and other fighting games you may or may not play makes you gain or lose momentum. I'm not really good at any other fighting games besides Sm4sh,so what makes me gain momentum is just playing well in a match against someone, if that happens I just play better and better. For what makes me lose momentum, whenever I SD, play in a laggy match, or lose against a bad player for whatever reason makes me feel discouraged and I just play worse and worse until I stop feeling discouraged.

 

[Hinichii.ez.™]

Geting a big/stylish combo works well.

 

[JingleJangleJamil]

Geting a big/stylish combo works well.

That also makes me play better,but it rarely happens unless I already have good momentum.

 

[Minato]

Getting randomed in an instance can make me lose momentum. It's something I'll have to not dwell on.

Gaining momentum is hard to say. It really depends on the game, but I'd say on average, it's if I did multiple reads in a row.
So basically, if I feel like closed off their options a few times, I'm able to comfortably play the rest out.

 

[Mindles]

when i SD i lose momentum sometimes