Array of TicksValue anywhere?

I would like to look back at previous tick prices... How would I do this?

To reference previous bar's values (ex. previous bar's close):

On a 1-minute chart, this would be the previous close of the 1-minute bar. However, I would like to look at the previous tick.

I can (for example) do this:

Output.WriteLine(Bars.Ticks[1].ToString())

However, I would also like to be able to do something like this:

Bars.TicksValue[0].ToString()

However, TicksValue is not an array, it only stores the last tick value. E.g. I want to access tick values, but from a 1-minute bar. This might seem a little strange, I guess!

There are two ways to do that:
1) Add second data series with the desired resolution and reference it from the code.
2) use DataLoader