You bought one TSLA call. The scale never moves, so you can watch the shape. Grab the blue dot: left and right changes the stock price, up and down changes implied volatility. Lock two variables and drag the third to isolate one effect. Leave a single variable unlocked and the faint ghost curves sweep its whole range.
Profit / loss per share
Value today (drag the dot) Ghosts (the range) At expiration Max loss (capped)
Value now
$0
per share
Profit / loss
$0
per share
Breakeven
$0
stock at expiration
Max loss
$0
the premium, capped
Plain English
Three things to know about reading a P/L curve:
Isolate one thing at a time. In practice the fastest way to build a feel for this is to lock two variables and drag the third.
Time and volatility lift the whole curve. More days and higher IV raise the today curve; decay sags it back toward the expiration line.
Price just walks you along the shape. Moving the stock slides you up or down the line; the shape itself is set by the strike and what you paid.
Taxes are not shown here. Options and the underlying stock are taxed differently, and it depends on your holding period and account type. None of this is tax advice.