The best image resolution to print our photos in forex is 150 dpi, it is a good value to start with, and the minimum resolution to print our photos in forex is 100 dpi, although it is also a recommended value when printing. And the size of the image has to be a real size, that is, if you want to make a 20 x 30 cm forex photo print, your image must have the same size or be proportionally larger. In general, the higher the dpi, the better the quality of the printed image to be printed. .