Call / put option price curve

European call option price curve

The horizontal axis is the price of the underlying asset （ Spot price ）

The longer time remaining , The closer the curve is to the upper limit line , The shorter the remaining time , The closer the curve is to the lower limit line
The greater the volatility , The closer the curve is to the upper limit line , Smaller volatility , The closer the curve is to the lower limit line

European put option price curve

The greater the residual value , The closer to the upper limit , The smaller the residual value , The closer to the lower limit line
The greater the volatility , The closer to the upper limit , Smaller volatility , The closer to the lower limit line