I have seen numerous examples of banking applications that use arrows to indicate money in and out of an account. However the direction of the arrow is a bit problematic, specifically in which direction shoud it point to indicate in or out?
So, is there any evidence or research to support using or not using arrows to indicate money movement?
So far I have explored a number of options and haven't decided yet which option to go for and welcome you ideas!
I do understand that part of the success of the arrow to represent direction is due to the fact that it could be turned in any give direction and still fulfil its primary function and this is probably its weakest point. That being said, could arrow icons still be used as a quick visual reference to indicate movement of funds without actually misguiding users?
Update: Thanks for all your responses. This was really helpful! We have decided to go for the solution below as it does solve the main issue when using arrows in this particular context. The solution was further enhanced using colour as suggested by some of the answers and comments.
BTW the above is an item in a filterable and sortable list and the use of the arrow in this particular case is simply a visual enhancement as I am not relying entirely on it to convey movement of money in and out of the account.
Thanks again to all!