MQL4自编指标学习2-Bars iBars() Print()

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函数Print()学习

void Print(
argument, // first value
… // next values
);

Parameters
[in] Any values separated by commas. The number of parameters cannot exceed 64.

Note
Arrays cannot be passed to the Print() function. Arrays must be input element-by-element.

例子1

1. Print("c=",c, "    Pi=",M_PI, "    (float)M_PI=",(float)M_PI);
   
2. // c=3.14159    Pi=3.141592653589793    (float)M_PI=3.14159

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预定义Bars学习

Number of bars in the current chart.
例子2

1. printf(Bars);
   
2.    //2018.11.28 10:36:48.160        柱体标号索引学习 EURUSD,H1: 2221
   
3.    //2018.11.28 10:35:55.080        柱体标号索引学习 EURUSD,H4: 8031
   
4.    //2018.11.28 10:36:26.926        柱体标号索引学习 EURUSD,Daily: 2049
   

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例子3

1. int counter=1;
   
2.   for(int i=1; i<=Bars; i++)
   
3.     {
   
4.      Print(Close[i-1]);
   
5.     }
   
6. /*
   
7. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.12909
   
8. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.1313
   
9. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.16021
   
10. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.16069
    
11. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.16898
    
12. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.16816
    
13. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.1691
    
14. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.20767
    
15. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.23257
    
16. .....
    
17. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.1091
    
18. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.1334
    
19. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.1113
    
20. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: 1.0819
    
21. 0        10:57:08.496        柱体标号索引学习 EURUSD,Monthly: initialized
    
22. */

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函数iBars()学习

int iBars(

string symbol, // symbol

int timeframe // timeframe

);

Parameters

symbol

[in] Symbol the data of which should be used to calculate indicator. NULL means the current symbol.

timeframe

[in] Timeframe. It can be any of ENUM_TIMEFRAMES enumeration values. 0 means the current chart timeframe.

Returned value

The number of bars on the specified chart.

例子4

1. rint("Bar count on the 'EURUSD,H1' is ",iBars("EURUSD",PERIOD_H1));
   
2.    //2018.11.28 10:38:16.128        柱体标号索引学习 EURUSD,H4: Bar count on the 'EURUSD,H1' is 2221
   
3.    //2018.11.28 10:38:37.721        柱体标号索引学习 EURUSD,H1: Bar count on the 'EURUSD,H1' is 2221
   

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