MT5 chart grid

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Hello all.

Please, is it possible to access the values that appear to the right of the grid matching chart ? 
If yes, can you give me an example ?

I want to use it in indicator 
 
What you mean? Do you mean the price levels on the y-axis?
 

I attached an indicator I made which will print the prices on the right of the grid anywhere you press (left click) on the chart.


There isn't a simple function that can obtain these prices on the Y-Axis so you have to create the formula. so this works:

// Calculate the Y-axis value (price level) from the mouse click position
double chartHeightInPixels = ChartGetInteger(0, CHART_HEIGHT_IN_PIXELS);
double priceRange = ChartGetDouble(0, CHART_PRICE_MAX) - ChartGetDouble(0, CHART_PRICE_MIN);
double pixelsPerPrice = chartHeightInPixels / priceRange;
double mouseYValue = ChartGetDouble(0, CHART_PRICE_MAX) - dparam / pixelsPerPrice;


Click around on the chart and look at the "Experts" tab to see the print.

Files:
get_prices_on_yAxis.mq5  4 kb
 
phade #:
What you mean? Do you mean the price levels on the y-axis?
Yes
Stocks are constantly moving but I would like to use it to develop a volatility indicator.
 
phade #:

I attached an indicator I made which will print the prices on the right of the grid anywhere you press (left click) on the chart.


There isn't a simple function that can obtain these prices on the Y-Axis so you have to create the formula. so this works:


Click around on the chart and look at the "Experts" tab to see the print.

Thank you, I'll get back to you
 

If you just wanted to get the open price or the close price of the candle in the current bar, you could use iOpen or iClose function:


void PrintCurrentCandleOpen()
{
    double openPrice = iOpen(Symbol(), Period(), 0);
    Print("Open price of the current candle: ", openPrice);
}
 
hello, excuse my delay; I tested the indicator but it does not work; nothing appears on the graph when i press left click
 
can y-axis price values be used to generate alerts ?
 
Tete Adate Adjete #:
hello, excuse my delay; I tested the indicator but it does not work; nothing appears on the graph when i press left click

Nothing is supposed to appear on the graph, you are just supposed to see print messages through the Experts tab (to show that it's working)

It is up to you to decide what should happen on the graph.
 
Tete Adate Adjete #:
can y-axis price values be used to generate alerts ?
Yes, but be clear about what you want to achieve.

- what type of alerts?
- what kind of price should trigger an alert?
 

as an example.. this will alert on the daily highs of the market


#property copyright "Copyright 2023, YourNameHere"
#property link      "https://www.example.com"
#property version   "1.00"
#property indicator_chart_window
#property indicator_buffers 1
#property indicator_plots   1
#property indicator_type1   DRAW_ARROW
#property indicator_color1  clrRed
#property indicator_width1  2
#property indicator_label1  "DailyHighAlert"


input int alert_frequency_in_minutes = 15; // Adjust this to control how frequently the alerts are triggered

//--- Indicator buffers
double dailyHighBuffer[];
int bars_per_day = 1;
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
{
    //--- indicator buffers mapping
    SetIndexBuffer(0, dailyHighBuffer, INDICATOR_DATA);

    //--- set the initial value for the indicator buffer
    ArrayInitialize(dailyHighBuffer, 0);
    
    PlotIndexSetInteger(0, PLOT_ARROW, 233);
    PlotIndexSetInteger(0, PLOT_ARROW_SHIFT, 50); //shift the arrow vertically
    
    
    //--- Calculate the number of bars in a day (assuming a 24-hour forex market)
    int period_seconds = PeriodSeconds(PERIOD_M15); // use 15 minute intervals for judgement (must use a time-based period)
    if (period_seconds == 0)
    {
        Print("Error: Invalid period specified for the indicator.");
        return 0;
    }

    // Calculate bars_per_day only for time-based periods (greater than 0)

    if (period_seconds >= 60) // Period is 1 minute or higher
    {
        bars_per_day = 24 * 60 / period_seconds;
    }

    // Make sure bars_per_day is not zero
    if (bars_per_day == 0)
    {
        Print("Error: Invalid period specified for the indicator.");
        return 0;
    }

    return INIT_SUCCEEDED;
}

//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
// ...

int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
{
    //--- Check for invalid inputs
    if (rates_total <= 0 || prev_calculated < 0)
        return 0;

    //--- Calculate the current bar's index in the rates array
    int current_bar_index = rates_total - 1;

    //--- Calculate the current day's starting index and ending index
    int current_day_index = current_bar_index / bars_per_day;
    int day_start_index = current_day_index * bars_per_day;
    int day_end_index = day_start_index + bars_per_day - 1;

    //--- Find the highest high of the current day
    double daily_high = high[day_start_index];
    
    for (int i = day_start_index + 1; i <= day_end_index; i++)
    {
        if (high[i] > daily_high)
            daily_high = high[i];
    }

    //--- Store the daily high in the indicator buffer
    dailyHighBuffer[current_day_index] = daily_high;

    //--- Check if the current price reaches the daily high
    if (close[0] >= daily_high)
    {
        //--- Trigger an alert
        static datetime last_alert_time = TimeCurrent();
        datetime current_time = TimeCurrent();
        if ((int(current_time) - int(last_alert_time)) >= alert_frequency_in_minutes * 60)
        {
            Alert("Price has reached the daily high: ", DoubleToString(daily_high, _Digits));
            last_alert_time = current_time;
        }
    }

    return rates_total;
}


I suggest studying the high[], low[], and close[] buffers in the OnCalculate function, as these buffers relate to the price of the candles on the chart.

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