So im really confused right now
I was reading on options greeks and learnt that calls have positive delta and gamma and puts have negative delta and positive gamma
which was right up until i was browsing through an options course which showed that short puts have positive delta and negative gamma.
How does delta and gamma differ for calls and puts ? is the “delta positive for calls and negative for puts” rule dependent on whether or not youre long/short an option ? could somebody explain the rationale behind why these greek values are positive/negative so that i dont have to remember them like rules and can derive the reasoning as and when i need ?