LINT_NEGATIVE_SHIFT
What happened
.shift() with a negative number pulls values back in time, so each bar reads a bar that had not happened yet.
What to do
Shift by a number of bars back, 0 or more.
Example
text
strategy.py, line 18: `.shift(-1)` moves a later bar's value onto an earlier bar. Use a number of bars back, 0 or more. [LINT_NEGATIVE_SHIFT]The wording of the message depends on your file, and the code does not. A warning does not stop the file from loading.