Summoning projectile with motion

I have been trying this for two days and cant get anything. I just want a trident to move. I used motion tags, direction tags, power tags, and it just spawns and falls down, this is what I have so far and it doesn’t work:

/summon minecraft:trident ~ ~3 ~ {Motion:[0,5,-10],Direction:[0,5,-10],Power:[0,5,-10]}

How can I go about getting my trident to move somewhere else?

/summon minecraft:trident ~ ~3 ~ {Motion:[0.0,1.0,-10.0]}