Trigger to compare 2 timestamps

[preeto]

Hi All,

I have an item that collects a timestamp value from a database and returns it as a unix timestamp, e.g:

1327336163

I want to define a trigger which will alert if the timestamp returned is in the future.

Some details regarding my install:

- Using Zabbix 1.8.9
- Master/ Proxy Setup. The Master is in the UK and the Proxies are in South Africa.

Any help would be appreciated.