Options from Zero · Lesson 3
Options, from absolute zero

The strike:
one dial, two trade-offs

You already bought a call. But at what price do you lock in your right? That number is the strike — and it's a dial.

Slide it one way: cheaper, but a long shot. Slide it the other: dearer, but it pays on a tiny move. You'll feel the trade-off in 2 minutes.

No advice — just a simulation.
XYZ
your stock · you think it'll climb
$100.00
today's price

One stock, many calls

XYZ trades at $100. A call lets you lock in a price to buy it later. But you get to choose that locked price — and there's a whole menu of them.
Lock in the right to buy at $95below today's price — already worth using
costs ~$800
…or at $105a bit above — needs a small climb
costs ~$300
…or at $125way above — needs a big jump
costs ~$50
That locked price is the strike
Same stock, same deadline — but the cheaper the call, the further XYZ has to travel before it's worth anything. The strike is where you set that trade-off.

Drag the strike

Same XYZ at $100, same 30-day deadline. Move the strike and watch three things move with it: what it costs, your breakeven, and how far XYZ must climb.
Your call's strike$105 call
$85↑ today $100$130
Out of the money — needs a climb to pay
It costs
$297
premium, paid up front
Breakeven
$108.0
strike + premium
Move needed
+8.0%
a modest move
XYZ sits at $100. To make money, it has to climb the blue gap to your breakeven before the deadline:
now $100
$108
See the trade-off?
Slide it lower and it gets pricey — but the blue gap shrinks, so a tiny move pays. Slide it higher and it's dirt cheap — but the gap grows into a long shot. Cost and odds move in opposite directions.

“Cheaper” isn't “safer”

Here are the two ends of the dial on the same XYZ. The price tags scream one story; the move needed tells the truth.
📉 cheap call
$22
Strike$130
Breakeven$130.2
XYZ must climb+30%
📈 pricey call
$1,238
Strike$90
Breakeven$102.4
XYZ must climb+2.4%
The $22 call feels like a free lottery ticket
It isn't. XYZ has to jump 30% in 30 days just to get your money back — most of the time it won't, and the $22 is simply gone. Cheap buys you a small chance, not a small risk.
The $1,238 call is the “sure-ish” one
It pays on a 2.4% wiggle — but you laid out real money, and most of that price is value the option already has (XYZ is past $90). You're not getting much leverage; you're nearly buying the stock.
There's no free lunch on the dial
Every strike is the market pricing the same trade-off fairly: pay more for better odds, or pay less for a longshot. The strike just picks your spot on it.

This is an option chain

That dial you dragged? Brokers show it as a list — one row per strike. Same numbers, just stacked. Tap any row.
Strike (call)
Price
Breakeven
You tapped the $105 call
Costs $297, breaks even at $108 — XYZ must climb +8.0%. The row you tap on a real chain is exactly the call you'd buy.
Green rows are in the money (strike below today's $100 — already worth using). Below the line is out of the money (needs a climb). That boundary line sits right at the current price — it slides as the stock moves.

The strike is your cost-vs-odds dial.

One number sets everything: what you pay, where you break even, and how likely it is to pay at all.

Lower strike, higher strike — same stock, opposite bets

Lower strike (in the money): dearer, but it's nearly already a winner — a tiny move pays. You're paying for value that's mostly there, so less leverage.

Higher strike (out of the money): cheap, exciting — but XYZ has to make a real move before it's worth a cent. Big leverage if you're right, nothing if you're not.

Breakeven = strike + the premium per share. It's the real finish line, and it's always further out than the strike. The cheaper the call, the further that line runs.

“Cheap” is not “safe.” The bargain-bin call is cheap precisely because it's a long shot. The market isn't giving you a deal — it's pricing the odds. You're choosing where on the trade-off to stand, not beating it.

Strike
the price you lock in
ITM / OTM
below / above today's price
Breakeven
strike + premium
Next up
You've fixed the strike. But every call also has a deadline — and the clock is never still. Next: how time both costs you and quietly drains you.
Next lesson →
Options from Zero · Lesson 3 of a risk-first options course. No advice — a simulation.