BACK-F'x'-SL3-SL, where 'x' is the number of seconds to go to the scheduled off. This trigger is activated on my BACK worksheet.
When there are, say, 15 seconds to go to the scheduled off AND the LAY hasn't been traded, I want to ensure I'm not left with an open BACK market so I fired-in a CANCEL trigger on my BACK worksheet, and a LAYR trigger on my LAY worksheet. Result being the LAY WAS triggered on the BACK-F'x'-SL3-SL trigger AND another LAY bet was activated on the LAY worksheet from the LAYR trigger - Result: 1 BACK bet; 2 LAY bets ....... and the damn selection won!!!!!

Shouldn't the CANCEL trigger fired-in with 15 seconds to go, on the BACK worksheet, have cancelled the LAY part of the BACK-F'x'-SL3-SL trigger???