Rocket League | Chain Wall Dash Quick Tutorial KBM

Have some amount of forward momentum.
Use adequate control to prevent the turning tendency that pulls you either up or down the wall.
Be light on your scroll wheel and airroll as this will either jump you away from the wall or cause you to turn up the wall respectively. The turning tendency may be caused by my drift bind being on my airroll, unsure.
Use slomo if you are unable to perform the mechanic, you can use this mode by going into a private match alone or by using bakkes mod (F2 - Current Game - Adjust Game Speed slider as necessary).

Good Luck!

Steam users how to bind:
Right-click rocket league in steam library
Properties...
Local Files
Browse
TAGame
Config
DefaultInput.ini (open in a text editor)

Epic game users how to bind:
Open File Explorer
Windows (C:)
Program Files
Epic Games
rocketleague
TAGame
Config
DefaultInput.ini (open in a text editor)