How do you do the wild bolt cheat in wizard101

In wizard101 i have a level 50 storm, and my wild bolt always works if I press the tab button on my key board and hold it down. But you have to press it the exact time you start drawing the storm symbol with your wand. Also, there is a way to tell if your spell will work or not. If you see a huge flash of light right before you start drawing the storm symbol your spell will work.