Trading this strategy on a different account is a administrative headache unless you happen to be a broker and can have multiple accounts from the same terminal. And on a rather sombre note, a Girl-friend is the most expensive thing a man can ever have.
Besides different terminals, you can play with this idea on same account (paper trade first!) on stock and its near future. However, be sure to have same amount of quantity in equity that is equivalent to the lot size on F&O.
If Future is trading at a premium relative to the equity,
a) When 30 min high on the equity chart is broken, buy equity and sell future
b) When 30 min low on the equity chart is broken, sell equity and buy future
If Future is trading at a discount relative to the equity,
c) When 30 min high on the equity chart is broken, sell equity and buy future.
d) When 30 min low on the equity chart is broken, buy equity and sell future
Only when the master orders are executed, enter the complementary stop losses and then wait...