Help With Two-Way Railway X junction

[Dashie]

So i have 2 Railways that are overlapping both are two-way railways and i want the X juction to be a Block that is blocked if a train is passing through the junction but i can't get it to work at all. the closest one i have got just was able to let the train pass the junction from 1 railway side and if they arrived at the destination they had no path

[Serenity]

Chain signal at the entrance. Normal signal at the exit:
https://www.youtube.com/watch?v=ps423d2WisY

The chain signal prevents a train from entering a block if it can't exit it

[ratchetfreak]

You need double signals on them. Put another signal on the other side of the track.

[vortex1967]

Signals on 2way tracks require to placed as indicated.
Chain signals are used before a crossing to prevent a train from blocking the crossing if the exit isn't free. Trains will stop when required.
There are 4 chain signals and 4 normal signals.

Hope this helps.

[Dashie]

Thx for the Help!