I was using cheat against a mobile game in bluestacks and found some addresses corresponding to what seemed like the way the game calculated the face value of the currency.
changed these floating point and double values and the game ended up telling me I didn't have enough currency even though face values were correct.

Point being that I ended up affecting the face value in a positive way where changing the face value of the currency meant nothing because the game checked against server data. (most likely)

So what is a good method of checking to see if a game houses the data server side vs client side?