Where to start an Elliott wave count: preserve the left boundary
Compare two starting points without disguising a change of research question as a repeat calculation.
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The first price bar visible on screen, the first row in a file and the origin of a proposed pattern can be different points. Identify which boundary you are choosing. Otherwise two aphigher-degree wavely conflicting wave interpretations may simply describe different input ranges.
Separate the three boundaries
Record the full file coverage, the segment selected for analysis and the proposed structural origin. A file may include earlier context that is not the origin of the pattern you are testing.
Do not select an origin only because it makes a preferred label fit. Explain what preceding movement and structural context support that choice, and what remains uncertain.
Run a controlled comparison
In an invented exercise, range A begins earlier than range B while both end at the same completed price bar. Keep the source file and other relevant conditions unchanged. Save two separate result records.
Compare which turning points and proposed higher-degree wave relationships changed. The outputs answer different range questions; a difference alone does not show that the software is inconsistent.
Check whether the missing context matters
If B starts in the middle of a movement, the visible segment may not contain enough evidence to establish the larger larger wave pattern. Obtain earlier history when it is relevant and available.
More history does not guarantee a unique interpretation. It gives you additional evidence to test the chosen origin and alternatives. Keep any unresolved higher-degree wave context explicit.
Keep the original experiment
When you revise the starting point, preserve the old record and explain why you revised it. Do not overwrite the earlier range and then compare the two results as though nothing changed.
Use the LBC and range guide for the product-specific range workflow. This article explains the research distinction and does not prescribe an undocumented control value or a universal best starting price bar.
You shift the left boundary by a month and obtain a different wave interpretation. Is that a repeat on identical input?
No. The selected range changed. Compare the two as separate experiments and explain what the extra or removed context affects.