找出Java List中有多少上升趋势从最低到最高

如何解决找出Java List中有多少上升趋势从最低到最高

有谁知道java List有多少上升趋势（这个时期从低到高）并取出来

public class StkBean  // stock data object
{
    double open; 
    double close;
    double high;
    double low;
    double amount;
    String txnDate;
    ......
}

List<StkBean> ls = Arrays.asList(......);   


public List<List<StkBean>> findUpwardTrean(List<StkBean> stockDailyDataList){
    List<List<StkBean>> upTreandList = new List<List<StkBean>>();
    
    //loop stockDailyDataList,and go thru logic
    upTreandList.add(upTrendsResult);// here upTrendsResult is List<StkBean>
    
    return upTreandList;
}