SIGNALS_INVALID

What happened#

compute() returned something Forge cannot use as signals. The message says what, and points at the line where compute is defined.

Common causes#

• compute() did not return fg.Signals(...).
• An array in fg.Signals does not have one value per bar. This is checked for the entries and exits, for plots, for record and for each filter.
• long_entry and short_entry are both true on the same bar.
• A region in plots ends after the last bar of the data.

What to do#

Return fg.Signals(...) from compute(), with every array as long as the data, and one side at most on each bar.

Related#

• Signals
• Warm-up

Example#

strategy.py, line 9, in compute: compute() must return fg.Signals(...), got tuple. [SIGNALS_INVALID]
strategy.py, line 9, in compute: long_entry has 499 values, but the data has 500 bars. Every array in fg.Signals has one value per bar. [SIGNALS_INVALID]
strategy.py, line 9, in compute: long_entry and short_entry are both true on 3 bars, first at bar 41. Choose one side per bar. [SIGNALS_INVALID]

The wording of the message depends on your file, and the code does not.