MQL4自编指标学习2

MQL4自编指标学习2

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

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

预定义Bars学习

Number of bars in the current chart.
例子2

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

例子3

  int counter=1; for(int i=1; i<=Bars; i++) { Print(Close[i-1]); }/*0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.12909
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.1313
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.16021
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.16069
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.16898
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.16816
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.1691
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.20767
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.23257
.....
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.1091
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.1334
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.1113
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: 1.0819
0	10:57:08.496	柱体标号索引学习 EURUSD,Monthly: initialized*/

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

Print("Bar count on the 'EURUSD,H1' is ",iBars("EURUSD",PERIOD_H1));//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//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