An option is a choice you pay for
An option is a contract that gives you the right — but not the obligation — to buy or sell a stock at a set price, by a set date. You pay a fee for that right, called the premium. If the deal turns out well you use it; if not, you let it expire and you're only out what you paid.
Two everyday analogies. A call option is like putting down a deposit to lock in today's price on something you expect to get more expensive. A put option is like buying insurance — you pay a little now for the right to sell at a set price if things go the wrong way.
Calls, puts, strikes, and expiration
Four words cover almost everything. A CALL is the right to BUY at the strike price; a PUT is the right to SELL at it. The STRIKE is that set price. The EXPIRATION is the deadline — after it, the option is gone.
So “a $200 call on XYZ expiring next Friday” means the right to buy XYZ at $200 any time until next Friday. It's worth something if XYZ climbs above $200 (plus what you paid for it); if XYZ never gets there, it expires worthless.
Why people trade them — and the risk
Options are popular for two reasons: leverage and defined risk. A small premium can control a lot of stock, so gains — and losses — are amplified. And when you BUY an option, the most you can lose is the premium you paid. No margin call, no owing more.
The catch is time decay. Every day that passes, an option loses a little value as its deadline nears — so you can be right about the company and still lose if the move takes too long. Options are powerful, unforgiving, and not a place for money you can't afford to lose. That's exactly why we're watch-only: we help you understand what's happening, we don't tell you to trade it.
Put it into practice
Open the dashboard to watch real options flow free, browse the full glossary, or see what each plan includes.