"Cash"/underlying for bonds, bund, crude oil?

[TraderD]

It is good to watch underlying for currencies and stock indexes - get better support and resistance levels then on futures charts (results of rollover).

For bonds/bund/oil I use futures charts only, and it got me thinking that I should find something which would show "cash" price.

Any ideas?

For bond I could use interest rate chart, but that's as far as I have got in my investigation.

 

[nazzdack]

For bonds & notes, keep an eye on the most active and cheapest-to-deliver securities.