Session Open H-Line
Info
The Session Open H-Line is a Indicator for MetaTrader 4 that draws a horizontal line at the session open, allowing for flexible time inputs. This indicator is an enhanced version of the original, which only allowed for session starts on the hour.
Usage
This tool is typically used for enhancing chart analysis and decision making.
Platform
This Indicator works exclusively on MetaTrader 4 (both build 600+ and newer versions).
Setup
Place the downloaded file in MQL4/Indicators folder via File ? Open Data Folder in MetaTrader 4.
How to Install and Use Session Open H-Line
1. Installation: Place your file in the MQL/Indicators folder via "Open Data Folder" and restart your terminal.
2. Loading: Find the indicator in the Navigator, drag it onto your chart, and configure the input parameters in the popup window.
3. Customization: Press Ctrl+I to open the indicator list, select your tool, and click "Properties" to change colors, levels, or visual styles.
4. Updating: Replace the old file in the Indicators folder with the new version and restart the platform to apply changes.
Frequently Asked Questions
Q: Why is my indicator not showing? A: Verify the file is in the MQL/Indicators folder, or try right-clicking the "Indicators" tree in the Navigator and clicking "Refresh."
Q: Do custom indicators slow down the platform? A: Too many complex indicators can impact performance; remove unused ones via the "Indicator List" (Ctrl+I).
Q: Can I use MT4 indicators on MT5? A: No, MQL4 and MQL5 are distinct languages; ensure the indicator is compiled specifically for your platform version.
What this tool does
Draws a horizontal line at the session open, allowing for flexible time inputs.
Typical Use Case
This Indicator excels in automated trading and technical analysis on MetaTrader 4.
Compatible Platform & Setup
This Indicator works on MetaTrader 4. Place the file in the MQL4/Indicators folder and restart the terminal.
Description & Settings
Related: pivot rs session indicator - another powerful indicator for MetaTrader 4 traders.
Draws a horizontal line at the session open, allowing for flexible time inputs.This indicator is an enhanced version of the original, which only allowed for session starts on the hour. Now, you can set the start time at any minute past the hour (e.g., 9:30, 10:42, 14:56).
Also recommended: trading sessions indicator - similar indicator with strong performance on MetaTrader 4.
Improvements include:
- Minute and hour input limits: Hours are capped at 23, and minutes at 59.
- Customization: Line color, thickness, and style can be adjusted.
Example: EUR-USD US open at 9:30 Eastern Time on June 4, 2026.
Note: Historical candle data may vary depending on the chart settings. The above example uses range bars (RB) set at 5 pips, resulting in range candles that are exactly 5 pips from low to high.
Limitations:
The minute feature has some limitations due to MT4's behavior of moving lines to the nearest candle open on higher timeframes. This is a result of the original code's setindexstyle(0,draw_line);
The indicator starts the H-line at the open of the candle corresponding to the minute setting. For instance, on an M5 timeframe, 08:05 will place the H-line at the open of the 08:05 - 08:10 candle, while on an M30 timeframe, 08:30 will place it at the open of the 08:30 - 09:00 candle.
If a time like 08:07 is set on an M5 timeframe, the indicator will skip the 08:05 - 08:10 candle and start the H-line at the next available candle open (08:10 - 08:15). Therefore, minute parameters ending in 07 are invalid. Similarly, a time like 02:00 on an H4 timeframe is invalid as the candle spans 00:00 - 04:00.
Valid hour and minute settings for different timeframes:
M1: All minutes past the hour (xx:00 - xx:59)
M5: xx:00, xx:05, xx:15, xx:30
M15: xx:00, xx:15, xx:30
M30: xx:00, xx:30
H1: 00:00 - 23:00 (on the hour only)
H4: 00:00, 04:00, 08:00, 12:00, 16:00, 20:00
You may also like: trend manager open2: enhancing trading efficiency - excellent alternative for indicator users on MetaTrader 4.
Source Code
#property copyright "robotfx"
#property link "https://robotfx.org"
#property indicator_chart_window
#property indicator_buffers 1
#property indicator_color1 dodgerblue
#property indicator_style1 0
#property indicator_width1 0
double todayopenbuffer[];
extern int hour_= 9;
extern int minutes = 30;.......
⚠ Limitations & Risk Warning
- This tool is provided for educational and testing purposes only.
- Past performance does not guarantee future results.
- Trading involves substantial risk of loss. Use on a demo account first.
- Results may vary depending on market conditions, broker, and settings.
- We recommend thorough backtesting and forward testing before using with real funds.