The chart looked textbook.
My entry was exactly where I wanted it.
For a moment, it even moved in my favor.
Then the market turned.
Sometimes the right trade still ends red.
The charts don't need my attention 24/7.
Learning when to disconnect has made me more patient, more focused, and much less likely to trade simply because I was staring at the screen.
one of the most important decisions in $SPY 0DTE trading:
which contract do you buy?
ATM or OTM?
here's exactly why i buy 1-strike out of the money every time.
and why it changes everything about how long you hold.
first — the math.
if $SPY is at $710 and i'm fading a rejection at resistance —
i buy the $709P. one strike OTM.
typically priced between $1.00 – $1.50 per contract.
a $0.30 – $0.50 move on that contract
= +15% to +25% on my premium.
that's my target. in and out. done.
here's why 1-strike OTM is optimal for this:
the price point is right.
not too cheap. not too expensive.
cheap enough that i can size correctly without overexposing my account.
expensive enough that a $0.30 move actually pays.
it has enough delta to move meaningfully
when price reacts at the level.
but not so much premium that theta destroys it
while i'm waiting for the setup to develop.
and the hold time stays short.
because 1-strike OTM at $1.00–$1.50 moves fast on a real level reaction.
i'm in and out in 1–15 minutes.
long before theta becomes a real problem.
now — when would i use ATM instead?
ATM contracts cost more. $2.00–$3.00+ typically.
higher delta. moves faster per tick.
but your target in dollar terms is larger
which means you need a bigger move to hit the same percentage.
ATM makes sense when:
→ you have extremely high conviction on a big move
→ you're expecting a $1+ fast aggressive flush or rip
→ volatility is elevated and premium is expanding
OTM makes sense when:
→ you're targeting the first reaction off a level
→ you only need $0.30–$0.50 to hit your target
→ you want to hold for under 15 minutes
→ you want to stay sized correctly without overleveraging
the wrong contract ruins a right thesis.
buy ATM on a $0.30 target
and you'll hold too long waiting for the dollar amount to make sense.
theta wins. you lose.
buy 1-strike OTM on a $0.30 target
and you're in. you're out. +15-25%. done.
right level. right direction. right contract.
that's the whole game.
One mistake almost every beginner makes is expecting to make money immediately.
Trading is a skill, not a shortcut.
The first goal should be learning how to manage risk and make consistent decisions, not chasing fast profits.