Data types for charsticks and key figers

Hi Friends,

please, Can any body tell about in which scenario which data type we can use for chasticks and key figers?

we are useing for amount with curr as datatype and some times we r using number with FLTP for amount key figer

but im not sure which one is correct ....can any tell all the details of all charsticks and key figers ...?

Thanks in adavamce !!!

Regards,

Venkat