The indicator does not repaint or redraw. The signal always come as soon as candle open.

Personally I tested it on Metaquotes demo account  15 minute chart for 6 months and it has 70% success rate based on 240 signals from the indicator for this 6 month period.

30 minute chart has 64% success rate too, based again on 6 months test and 103 signals from the indicator.

Which makes that indicator very good tool for trade.