Whitebalance

Simple and Quick way to whitebalance your shots, based on ociocdl node

Pick a grey area, (area select to average out noise) it then averages R+G+B and multiplies each channel to be the same as the average, this is the most basic way to whitebalance/Neutralgrade a plate, its simple but very powerful, it can easily be reversed and exporrted as a .CC file and used studio-wide as a CDL inside OCIO, synColor or other Color management tools. 

you can also remove the expression on the average knob and just type in 0.18 or whatever you have as a reference to also change luminance to the desired target. 

Why should you use this instead of mcBeth charts?

https://www.colour-science.org/posts/the-colorchecker-considered-mostly-harmless/