I uses a two chart system myself. The first is a non-renko chart and the second is a renko chart. created alerts based on indicators on both charts, but the strategy is applied to the main chart. Here are some snippets on how I did it.

Keeping in mind this strategy is being placed on the non-renko chart, I need to "add" a renko chart to it during initialization:


protected override void Initialize()
{
CalculateOnBarClose = true;
Add(PeriodType.Final2, 6);
}

then later, in the OnBarUpdate section, i first need to specify what to do for ticks relate to each chart:

protected override void OnBarUpdate()
if (BarsInProgress == 0)
{logic for non-renko main chart}
else if (BarsInProgress == 1)
{logic for secondary renko chart}

Using this format you can theoretically as much info from as many charts as you need, though I only use two, so YMMV. Also, PeriodType.Final2 is specific to the "WickedRenko" which is what I use.

Thank you for the response. Just to make sure I understand this right, if I added a 3rd chart to the strategy would this be referenced as such:

else if (BarsInProgress == 2)
{ do something with 3rd chart }

is that understanding correct?