如果我有一个生成变量（myIndi）的指标（Var1），我该如何从EA访问Var1？
我已尝试iCustom()但未获得结果。
答案 0 :(得分：0)
有两种方式：
- 让这个变量成为缓冲区，并通过 iCustom(); 来访问缓冲区和位置
- 将此变量写为GlobalVariablesOfClientTerminal并将其读作GV。
也可以在EA中移动指标的逻辑，在这种情况下，您将能够直接访问该参数，但这通常不那么容易。
答案 1 :(得分：0)
iCustom()是EA与自定义指标之间的主要接口没有理由，为什么调用iCustom()不会返回值，因为 myIndi 编译成功并且构建的自定义指标主要是正确的内部工作（不要犹豫发布MCVE代码示例来证明或证明这一点）。
下一步：
发布帖子的更新，以包含MCVE代码，以便查看此类调用的实际状态的根本原因：
retVal = iCustom( _Symbol, PERIOD_CURRENT, "myIndi",
<p1>,
<p2>,
...,
<id#>,
<shift>
);
以下方法对于EA端和指标端团队来说都是健壮的，可以平稳安全地分享不断变化的想法，并维护 iCustom() EA端呼叫接口的所有版本干净，安全，另外创建一个更具可读性的调用接口（#define - 用于有意义和连贯的行＃-identifications的人类可读名称。）
自定义指标开发人员在自定义指标和EA团队的整个生命周期中维护这些部分，只需 #include 这些作为任何版本的自解释模板正在EA中使用。
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! <<_MAINTAINED_SECTION_>>.START
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!! -------------------------------------------||||||||||||||||||||||||||||||||||||||||||| POSITIONAL ORDINAL-NUMBERED CALLING INTERFACE ||||||||||||||||||||| all iCustom() call MUST BE REVISED ____________________________ !!!
//--- indicator parameters -------------------------------------------||||||||||||||||||||||||||||||||||||||||||| POSITIONAL ORDINAL-NUMBERED CALLING INTERFACE ||||||||||||||||||||| all iCustom() call MUST BE REVISED ____________________________ !!!
//!!! -------------------------------------------||||||||||||||||||||||||||||||||||||||||||| POSITIONAL ORDINAL-NUMBERED CALLING INTERFACE ||||||||||||||||||||| all iCustom() call MUST BE REVISED ____________________________ !!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
#define XYZ_CUSTOM_INDICATOR_NAME "an_XYZ_<fileName_w/o_.MQ4>" // the Custom Indicator fileName
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//--- input parameters -------------------------------------------------------- iCustom( ) CALL INTERFACE
input int nBARs_period = 18;
extern double MUL_SIGMA = 0;
sinput ENUM_APPLIED_PRICE aPriceTYPE = PRICE_CLOSE;
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
/* = iCustom( _Symbol, PERIOD_CURRENT, XYZ_CUSTOM_INDICATOR_NAME, // |-> iCustom INDICATOR NAME
XYZ_nBARs_period, // |-> input1 nBARs_period
XYZ_MUL_SIGMA, // |-> input2 MUL_SIGMA
XYZ_PRICE_TYPE, // |-> input3 aPriceTYPE from: ENUM_APPLIED_PRICE
XYZ_<_VALUE_>_BUFFER_ID, // |-> line# --------------------------------------------from: { 0: Val1 == Buffer0[] | 1: Buffer1[] | ... }
aShift // |-> [aShift]-aTimeDOMAIN-offset of a Val1[] to return
); //
*/
#define XYZ_Val1_BUFFER_ID 0 // <---- <Val1>[]
#define XYZ_Val2_BUFFER_ID 1
#define XYZ_Val3_BUFFER_ID 2
#define XYZ_Val4_BUFFER_ID 3
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!! -------------------------------------------||||||||||||||||||||||||||||||||||||||||||| POSITIONAL ORDINAL-NUMBERED CALLING INTERFACE ||||||||||||||||||||| all iCustom() call MUST BE REVISED ____________________________ !!!
//--- indicator parameters -------------------------------------------||||||||||||||||||||||||||||||||||||||||||| POSITIONAL ORDINAL-NUMBERED CALLING INTERFACE ||||||||||||||||||||| all iCustom() call MUST BE REVISED ____________________________ !!!
//!!! -------------------------------------------||||||||||||||||||||||||||||||||||||||||||| POSITIONAL ORDINAL-NUMBERED CALLING INTERFACE ||||||||||||||||||||| all iCustom() call MUST BE REVISED ____________________________ !!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! <<_MAINTAINED_SECTION_>>.END
对于此问题域，使用 GlobalVariable* 调用不是一个强大的用例，因为预期会出现许多副作用，并且此类代码值集成是在没有EA的情况下容易停止工作 - 能够检测到这种（语义）故障。
使用自定义指标逻辑＆＃34;内部＆＃34; EA是可能的，但是以完全重新设计逻辑为代价，因为EA代码执行单元的行为与MetaTrader4终端代码执行环境中的自定义指示器代码执行单元的行为不同。值得注意的是，由于MQL4语言（和终端） - 规则，仅对于HFT级项目或极其延迟敏感的实现来说，在进入这个方向之前仔细决定利弊和专业人员是有意义的。