"Indicator is visible", "Indicator appear", "Condition" (indicator > 0). It depends. When you use "Condition", if any of it's operands have value EMPTY_VALUE, the block does not pass and that's why Indicator vs Numeric works.
"Once per bar" can also help - https://fxdreema.com/demo/mt4-once-per-bar
Use "Trace" to check if the buffers are giving you values that can be used, something like this - https://fxdreema.com/demo/mt4-trace-psar
Most arrow indicators have nothing for the current candle, so try with Candle ID = 1 or bigger.
Only for "Indicators (My Indicators)" in "Condition" there are extra options available if you click "More options"