Is it possible that generator could not generate any strategies on lower time frame?
The Generator generates strategies for every timeframes. It doesn't make a difference for the timeframe, symbols, or broker. It tries to generate strategies for the bar data you provide by using the available indicators and fulfilling the Acceptance Criteria. It works for all timeframes. However, the data specifics may change the output. For example, the shorter tie frame usually has a larger number of bars with a lower range. It may happen that the lower timeframe require different acceptance criteria.
4. When you update data source, do you need to update the symbol settings too each time?
It depends on what you mean by "update" a data source. Generally, you add a symbol and adjust the symbol's settings once. Of course, you can change them later, but this is not necessary.
If you mean updating the data files, it is also not necessary.
If you put data from a different broker in the data folder of another broker, you may need to change the settings.
5. how do I fix large number of ambiguous bars?
There is nothing to fix in your case. FSB Pro shows that all bars are "Ambiguous" because the "new" strategy has ambiguous trading rules for every single bar. You simply need of a trading rule. Use any opening logic condition indicator and the ambiguous bars will disappear.
Your strategy has zero trades. it is not important how ambiguously it made them.
I am not sure what is causing this, so I asked. Hoping that I could get some ideas
There are many possible reasons however without further information we cannot give correct advice.
You can try to disable the Acceptance Criteria because this is a reason number one that prevents accepting new strategies.
Please give us more information:
- open one of the provided demo strategies. Is it shows any trading result?
- does the Generator generates strategies on H1 and M30 but not only on M15?
- how did you update your Data Source? Please post screenshots.
Try to generate on the "MetaTrader Demo" data or download new data from "History Center" -> "Demo Data"