Liliya Yunusova
Article publié Installation de MetaTrader 5 et d'autres applications MetaQuotes sur HarmonyOS NEXT
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Williams John
Williams John 2025.12.18
Hi
Williams John
Williams John 2025.12.18
Now the trough and trough time arrays, PeakDN and TimeDN respectively, contain the required data on the identified extremum and the trough array index points at the next cell of this array. The next loop iteration follows the same pattern when identifying the next extremum and its data is written into the new cell of the trough array that the trough array index (k) points at. Peaks (upper extrema) are identified in a quite similar manner, except that the first, second and third bars are compared in the opposite way: the less-than sign and greater-than sign should be interchanged. At this stage, our function can read the A/D indicator data, fill the array using this data and identify extrema in it, as well as save values and locations of extrema into the four designated arrays. This is when we can start displaying trend lines in the indicator chart plotting them based on the extrema identified. Let us first display "global" trend lines in the indicator chart. In order to plot them by connecting the chart extrema, we should start with the identification of two extrema - the extremum with the smallest value in the entire trough array and the extremum we will refer to as main. The main extremum will be located in immediate proximity to the beginning of the trough array and be set strictly equal to 2. Thus, the first two extrema being closest of all to the current bar in the indicator chart will not be taken into account (to leave a certain freedom to the price movement without having to react to a slightest change occurring in it). Now that the main extremum is identified, we need to find the extremum with the smallest value in the array located to the left of the main extremum. This extremum will be the lowest in the indicator chart serving as the starting point for the final identification of the second extremum. Drawing of a trend line in such a way that it connects the lowest extremum and the main extremum will most likely lead to the situation where the trend line is crossed by the extrema higher than the lowest extremum identified. And it means that the beginning of the trend line should in this situation be moved to the extremum crossing the trend line. The Figures below are a clear demonstration of such a case
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