That's "BBand Stop Alert.mq4". You can download it here:
viewtopic.php?p=1295400402#p1295400402
or "Price Channel Stop (mtf+alerts).mq4"
viewtopic.php?p=1295357379#p1295357379
or "Trend envelopes - multi pass moving average filter 1.01.mq4"
viewtopic.php?p=1295355421#p1295355421