Chart pattern is a shape drawn on the price chart to predict future price movements based on the past data. 
Chart patterns are split into below three types, depending on the price behaviour.
1 Reversal Chart Patterns: They signal the ongoing trend is about to change and price will reverse direction.
2 Continuation Chart Patterns:  They signal that ongoing trend will continue and price will continue in current direction 
3 Bilateral Chart Patterns: They signal that the ongoing trend will either continue or it can change direction. 

Examples of Chart pattern types.

Continuation Patterns Examples : 

• Flag, Pennant
• Rectangle
• Price Channel
• Measured Move – Bullish
• Measured Move – Bearish
• Cup with Handle

Reversal Patterns Examples : 

• Double Top Reversal
• Double Bottom Reversal
• Head and Shoulders Top
• Head and Shoulders Bottom
• Falling Wedge
• Rising Wedge
• Rounding Bottom
• Triple Top Reversal
• Triple Bottom Reversal
• Bump and Run Reversal

Bilateral patterns Examples : 

• Ascending Triangle
• Descending Triangle
• Symmetrical Triangle

Traders & Investors chart patterns as a technical analysis tool to determine the projected price of securities. 

Practice Chart Patterns – Beginner