This code snippet demonstrates how to identify potential supply and demand zones (commonly known as support and resistance levels) using the ZigZag indicator in the ProBuilder programming language. The ZigZag indicator is used to filter out smaller price movements, focusing on significant highs (peaks) and lows (troughs) based on a specified percentage change.

// Parameters
percent = 3
lookback = 200
threshold = 1
minPoint = 2

// ZigZag calculation and support/resistance logic here
// (Actual code implementation would be placed here)

Explanation of the Code:

• percent = 3: This sets the minimum percentage change required for a new peak or trough to be considered in the ZigZag calculation. A change smaller than this percentage will be ignored, reducing noise and focusing on significant swings.
• lookback = 200: This parameter defines the number of bars to look back to determine if a peak or trough can be considered as a potential support or resistance level. This effectively sets the temporal scope for the analysis.
• threshold = 1: This is the percentage range within which a new ZigZag peak or trough must fall to validate a previous one as a support or resistance level. It ensures that only closely aligned peaks and troughs are considered valid.
• minPoint = 2: At least two swings of the same type (either peaks or troughs) must be within the “threshold” percentage of each other to validate a level as support or resistance. This parameter helps in confirming the strength and relevance of the support or resistance level.

The code snippet would typically include logic to calculate the ZigZag values based on price data, identify peaks and troughs, and then apply the criteria defined by threshold and minPoint to determine valid support and resistance zones. These zones are crucial for traders as they can indicate potential reversal points in the price of an asset.