Expression: 'Keep your fingers crossed'

Hi

I would like to discuss this idiom I just read in Alan’s story.

Keep one’s fingers crossed: My dictionary defines it as: to remain hopeful.

Could you please shed some more light on it?

Tom

Hi Tom,

It’s a sort of superstition that if you keep your fingers crossed then you will not fail or come to harm. People say: I’m keeping my fingers crossed for you when they want you to succeed in say taking an exam, applying for a job or taking your driving test.
A

to fold one finger across another in the hope of bringing good luckwww.englishbyidioms.com