amibroker buy sell late signals problem, plz help

Hello experts out therr,

I just downloaded one afl from stockwisebroker named All In One afl which seems very good first but when i tested it on 15 min timeframe using Bar Reply in amibroker, the buy sell signal arriving 8-10 bars late,

I mean to say if there is buy signal at 9.30 a.m, we can see it at around 11.00 a.m when market is live, i think there is some delayed at buy sell codes but i am not able to understand that