Better way?

So i just got raul and i am confused as hell on how to charge his bar i get that if you move backwards and forward it has a different spike and bar but thats it, when i press the jump button he doesnt do an approah like jenny he just jumps and i cant do the long serve anyone does. Do i have to turn on the approach on the settings cause if i do is there any other way? Cause im not used to using it unless its on jenny im used to the normal spikers that doesnt have a charge just jumps yk? So is there a setting for it to just be raul or i have to get used to it and how do i charge the back/red bar properly