Disclaimer: Data may be delayed, incomplete or inaccurate. For education and research only. Use at your own risk. Not financial advice.
Simulate thousands of possible price paths and see the spread of outcomes, not just one forecast. Choose constant volatility (geometric Brownian motion) or volatility that moves on its own (the Heston model).
A model of uncertainty, not a forecast. Real prices have jumps, regime changes and fatter tails. Not trading advice.