help please

Hello someone can say to me that code to use to control all the operations of purchase and of sale to open simultaneously, equally the total of operations example if only I love 10 that on the 10 having completed my robot is closed and as to put a limit to the opened operations example if only I want one of sale and one of purchase in order that there are not executed mas bony that alone are kept this two and that should not execute any mas until anyone is closed in advance thank you and pardon for the translation