Hi there,
For the historical candle
s block: there is nothing to display at the level of this output as it consists of a data array: to be able to use such output you need to plug it to the loop viewer block and use a new variable to "breakdown" this output . For the get historical candle (single candle) you can check the content of the output in your user's variable section.
For the indicator issue, I tried to reproduce what you've experienced but without any luck: it works fine for me. Did you tried to restart the strategy processor?
