Does anyone know a really reliable free (or not very expensive) service which will promptly send an email to a specified address (not a text message to a mobile phone) when a stock/index reaches a certain target? For example, this morning I wanted to know when Abbey National reached 594, and tried the free alert service at BetOnMarkets - they duly notified me by email about 40 minutes later, which wasn't all that helpful. Any suggestions?