在队列中查找最大值？

Question

我有一个窗口大小为300的数据队列。一端添加新数据，另一端删除旧值。

我希望队列数据保持或多或少一致，例如：10,12,15,10,20，然后开始急剧上升：15,10,20,22,25,26,28,30,32 ......一直到150左右。在那里数据可能会有一点波动，然后它会以类似的斜率（120,118,116,115 ......）一直下降到20左右。

我正在尝试以编程方式识别此数据系列中的转折点，但我的代码检测到的峰值比我想要的更频繁。如何确定图表何时上升，何时达到确定的转折点以及何时开始下跌？

     NSNumber* last10 = [queue5Min objectAtIndex:[queue5Min count]-10];



     NSNumber* last240 = [queue5Min objectAtIndex:[queue5Min count]-240];
                int value = 0;
                int last240Int = [last240 intValue];//debug

                //compare against some point in the past
                for(int i = 10; i<20;i++)
                {   last10 = [queue5Min objectAtIndex:[queue5Min count]-i];
                    value += [last10 intValue];
                }
                value = value/10; //find the average of the point in the past
                //attempt to detect sharp rise compared to the past
                if( queueValue5Min >25 && queueValue5Min> [last240 intValue]*2)
                {
                   if(queueValue5Min>value)
                   {
                        stateMachine5Min = kActivityRising;
                         NSLog(@">>>>>>>>>>>> 5 min Rising @ %i:, %i, %i",epoch, value,queueValue5Min);
                   }else if(queueValue5Min <value)
                   {
                    NSLog(@">>>>>>>>>>>> 5 min FALLING @ %i:, %i, %i",epoch, value,queueValue5Min);
                       stateMachine5Min = kActivityFalling;


                   }
                    else if(smallActivityCount5Min == value)
                    {
                        NSLog(@">>>>>>>>>>>> 5 min peak @ %i:, %i, %i",epoch, value,queueValue5Min);

                        stateMachine5Min = kSmallActivityAnalyzerActivityPeaked;
                                  }


                }else
                {

                    stateMachine5Min = kSmallActivityAnalyzerActivityFlat;
                }