Figure 1: a screen dump of the TREE schematic for a simple technical trading system. The topmost schematic is labeled to indicate how it corresponds to the discussion of Section 3. The lower schematics illustrate the use of hierarchy in TREE: they are composite blocks that can be reused in other contexts. The red lines do not appear in the original screen shot, but were added to point out the relation between the schematics.
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Copyright 1997, Structured Software Systems, Inc.