Creating a spread chart between two futures

is it possible to create inter-market spread charts between two futures contracts? ie: bund/bobl

I know its possible to create these synthetically in eSignal but I presume since MC accesses the data server directly these synthetics are not accessible?

We are planning to include support for synthetic symbols in the future; as of now, the only way to do this in MultiCharts is to use Excel as mediator.