Is there way to configure such chain MyApp->Fiddler->Web Proxy*->Target Server?
*Web Proxy is one from this list.
P.S. I know how to configure MyApp->Fiddler->Target Server but I need to test some functional associated with situations when user login from unusual location (for example from Africa)
Fiddler can chain to any upstream proxy. By default, it chains to the proxy that Internet Explorer was configured to use when Fiddler started. But you can also manually set the upstream proxy in Fiddler by clicking Tools > Fiddler Options > Gateway.