I don't check forums much so my apologies if this has been suggested, but a 1k increment or even more would be swell. Or an option to repeatedly buy/sell the same amount such as android has.
Yes Rasta that's been suggested before for iDevice accounts, along with other features that are only on droid/iDevice. However the devs don't seem interested in granting any of those types of requests.
I still feel as if 1k would not be enough. A option to type in X amount and have it show the cost for X amount and then be able to purchase X amount would be pretty neat across all devices (Android, IOS, PC).
Support or really there should just be an input box for xxxx amount between 1 & 9999 for both buy & sell.