Creation of NinjaTrader indicator or bot

Hello, i need you to develop for me indicator/ea for ninjatrader that will allow me to set a different  stoploss per multiple assets or pairs at the same time no matter how many contracts i open, if i choosed 300$ stoploss no matter how many contracts i opend it should close all of the positions , for example lets say i trade 3 pairs EURUSD, USDJPY and GBPUSD, i set EURUSD stoploss 300$ , USDJPY 400$ and GBPUSD 200$ , i trade all of them at the same time when one of them reach the stoploss that i set it should close all of the positions of the same asset or pair and the rest should keep trading

if i set sl on some asset for 300$ lets say, if i earned before 50$ on realized profit its still should close the trades on drawdown of 300$ so at the end of the day i will lose 250$ ( after 50$ profit i earned)

and also if i want to use that on my another account but only if i gave him permission to use it , if i didnt gave him permission it wont work.