Partial closing buttons and break even button.

All the EA's that i've seen that has partial closing feature, they all force you to put how many pips for a 50% partial close in example. What i just want, is a button 50% to partially close the current pair. Maybe two buttons, 25% and 50%. You see, im a manual trader, i'm not calculating pips or that at all, i trade by pure common sense and i've been trading like that since years with success. I just want a button that is always present on the chart, to quickly partially close 50% and 25% of the current pair. Even if i have to add a EA in each chart for that, don't care about complicated coding so that you only need to open the EA in 1 chart. Nah, im ok if i have to add it to all charts i have open. It would be nice if it could have a option to partially close all current open pairs. Also a break even button that would set the stop loss at break even but only when i push the button, i don't want something that would break even automatically. 

No idea if i need a script or a EA.