如何判断当前时间周期？求替代假函数的时间框架检测函数

Hey there! Let's break down your questions clearly—since your example syntax looks a lot like Pine Script (used in TradingView), I'll focus on that first, plus a quick note on MQL (MetaTrader) in case you're using that platform.

1. Real Functions to Detect Time Periods #

Most trading scripting languages have built-in tools to check the current time frame, so you don't need to write custom is5mTimePeriod functions. Here's how it works in the two most common platforms:

Pine Script (TradingView) #

Pine Script has predefined boolean variables for every standard time frame. You can use these directly:

• timeframe.is.m1 = 1-minute
• timeframe.is.m5 = 5-minute
• timeframe.is.m15 = 15-minute
• timeframe.is.m30 = 30-minute
• timeframe.is.h1 = 1-hour (60-minute)
• timeframe.is.h4 = 4-hour
• timeframe.is.d = Daily
• timeframe.is.w = Weekly
• timeframe.is.m = Monthly

You can also use timeframe.period to get the string representation of the current time frame (e.g., "M5" for 5-minute, "H1" for 1-hour) if you need more flexibility.

MQL4/MQL5 (MetaTrader) #

In MetaTrader, use the Period() function which returns an integer code for the current time frame. The key codes are:

• PERIOD_M1 = 1
• PERIOD_M5 = 5
• PERIOD_M15 = 15
• PERIOD_M30 = 30
• PERIOD_H1 = 60
• PERIOD_H4 = 240
• PERIOD_D1 = 1440
• PERIOD_W1 = 10080
• PERIOD_MN1 = 43200

2. Setting Variables Based on Current Time Frame #

Let's translate your example into working code using the real functions above.

Pine Script Example #

//@version=5
indicator("Time Frame Variable Example", overlay=true)

a = 0
// Assign value to 'a' based on time frame
a := timeframe.is.m5 ? 1 : 
     timeframe.is.m15 ? 2 : 
     timeframe.period == "M45" ? 3 :  // For non-standard 45min frame, check the string directly
     timeframe.is.h1 ? 4 : 0

// Print the value to confirm
var label infoLabel = label.new(bar_index, high, str.tostring(a), color=color.blue)
label.set_xy(infoLabel, bar_index, high)
label.set_text(infoLabel, "Time Frame Value: " + str.tostring(a))

Note: For non-standard time frames like 45-minute, if the predefined timeframe.is.m45 doesn't exist, checking timeframe.period == "M45" is a reliable workaround.

MQL4 Example #

//+------------------------------------------------------------------+
//|                                                  Example.mq4     |
//|                        Copyright 2024, MetaQuotes Software Corp. |
//+------------------------------------------------------------------+
#property copyright "Copyright 2024, MetaQuotes Software Corp."
#property version   "1.00"
#property strict

int a = 0;

//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
{
    // Assign value to 'a' based on time frame
    switch(Period())
    {
        case PERIOD_M5:
            a = 1;
            break;
        case PERIOD_M15:
            a = 2;
            break;
        case PERIOD_M45: // Confirm your platform supports 45min periods first
            a = 3;
            break;
        case PERIOD_H1:
            a = 4;
            break;
        default:
            a = 0;
            break;
    }
    Print("Time Frame Value: ", a);
    return(INIT_SUCCEEDED);
}
//+------------------------------------------------------------------+

That's it! These snippets use native platform functions, so they're reliable and save you from building custom detection logic.

内容的提问来源于stack exchange，提问作者N9va