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To traverse a binary tree in Postorder, use the following recursive algorithm in Python: 1. Define the node structure of the binary tree: ```python class TreeNode: def __init__(self, value): self.value = value self.left = None self.right = None ``` 2. Create a recursive function for Postorder traversal: ```python def postorder_traversal_recursive(node): if node is None: return postorder_traversal_recursive(node.left) # Traverse left subtree postorder_traversal_recursive(node.right) # Traverse right subtree print(node.value) # Process current node (e.g., print its value) ``` 3. Test the algorithm with an example binary tree and call the `postorder_traversal_recursive` function: ```python root = TreeNode(1) # Create the rest of the binary tree structure # ... postorder_traversal_recursive(root) ``` Here's an example tree structure: ``` 1 / \ 2 3 / \ / \ 4 5 6 7 ``` The algorithm will print the Postorder sequence: `4 5 2 6 7 3 1`.