Ignoring previous day signals

Hi All,
I have a heikenashi chart which is working fine but only issue is it is considering yesterday signal for the current day as well . I am looking to generate fresh signal @9:15 AM.
Ex- let's consider yesterday @3 pm I got sell signal and same is continue upto 3:30 if tomorrow market is in bearish chart is not generating the fresh signals it is continuing yesterday signal only.