Export RSI data to a csv file?

#property show_inputs

extern int RSI_Period = 10;

int start() {

    // open file
    int iFile = FileOpen("RSI_Dump.csv",FILE_WRITE|FILE_CSV,",");
    if(iFile == -1) {
        Print("Unable to create file.");
        return(0);
    }
    
    // iterate bars
    for(int i=Bars-RSI_Period-1;i>=0;i--) {
        string sTime = TimeToStr(Time[i],TIME_DATE|TIME_SECONDS);
        double dRsi  = iRSI(NULL,0,RSI_Period,PRICE_CLOSE,i);
        FileWrite(iFile,sTime,dRsi);
    }
    
    // close file
    FileFlush(iFile);
    FileClose(iFile);
    Print("Done.");
}