Ok ive found it, It's called
The Rule of 5 & 10. It was first suggested in the book PL and NL Poker by Stuart Ruben & Bob Ciaffone. On the surface of it if it means if it costs us 5% of our stack or less then we call and if it costs us 10% or more we fold. In between is a judgement call depending on how confident you feel with your post flop play, your position and the quality of your hand. I am prone to calling with almost anything on or near the button if there are players in raising who bet on the flop if they have something or check if they dont. If they do make a continuation bet on a flop of J65 say i will reraise them and steal the pot. Just if i feel the time is right. I dont claim to be an expert of the game infact im still a relative noob but i just want to share some of the things ive picked up and share it with others and also look for some expert advice on the way i play things. If i get raised back by the raiser then i would let it go.
your stack at the beginng relative to the blinds will allow you to play a lot more speculative hands. when i say speculative i dont mean hands like A6 offsuit i mean pairs and suited connectors (i think) you can even play them to a small raise if the rule of 5 and 10 still applies. Dont forget i havent really tested all this out but it sounds like a good rule of thumb to me. It should allow me to motor along nicely collecting chips along the way.
An important point to note about the Rule of 5 & 10 is that if you have a bigger stack than your opponent then it's his stack that you use the rule on his stack. you cant win more than his stack so the implied odds only applies to the smaller stack.
how does this relate to when there is 5 people in the pot? Im pretty sure it means the lowest stack no matter. Maybe not as surely the implied odds with the other 4 people would be enough
If you commit more than 10% of your stack to an early position raise it doesnt mean that you should fold it just means that calling probably isnt your best option. Moving in or folding would be your optimal choices.