SCR testing

Is there a way to test an SCR to know when the gate is being triggered and have an indicator like an LED indicate the triggering as well as know when the SCR becomes latched.

I have been able to get a circuit and test to see if an SCR is latched but I need to be able to monitor it with out affecting the original circuit.

Can we see the circuit? What's the application? What are you controlling and what's the voltage?

You can probably use an LED (with a current-limiting resistor appropriate for the voltage) in parallel with the load. Typically, you are "powering" something and any extra current through an LED will be insignificant.