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//A nice array that contains all the money values for everyday with now being MAX_DAYS
float money_per_day[MAX_DAYS];

// returns the SMA value for this_day averaged over days_average
float SMA(int this_day, int days_average) {

// if the asked day is smaller than the averaging period before it, then return a fake one. another solution is to return 0.0 as it might be disturbing to have wrong averages.
    if this_day<days_average {return SMA(this_day,this_day)}

    float sum=0.0;
    for (int i=0; i<days_average;i++) {
         sum+=money_per_day[this_day-i];
    }
    return (sum/days_average);
}
float SMA45(int this_day) {return SMA(this_day,45);}