Here are some trading themed "pure black" AMOLED wallpapers for your Android and Apple smart phones.
Amoled wallpapers take advantage of the crisp displays on your smart phones and save massive amounts of battery power by using pure black RGB 000,000,000 as the dominant color and simple graphics. Recent tests show that using a black AMOLED backgrounds and themes can save up to 41% of your batter time (or more than an hour extra usage) which can certainly help with trading if you are active on your phones.
Now they aren't as "flashy" or "pretty" as other wallpapers but that's the beauty of Amoled! Simple and best of all power saving.
If you have any requests or issues, let me know!
I'll post more up soon!