Expert Advisor Programming by Andrew R. Young

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EXPERT ADVISOR PROGRAMMING Multiple statements must be enclosed in braces. The else operator evaluates an alternate condition, provided that the previous if statement(s) are false. You can combine else and if to create an alternate condition that will only be executed if it's true. For example, this code evaluates three conditions in order. If one of them is true, only that block of code will be executed. If none of them are true, none of them will be executed: if(Condition1 == true) // Execute condition 1 else if(Condition2 == true) // Execute condition 2 else if(Condition3 == true) // Execute condition 3 The else operator can be used by itself at the end of an if-else sequence to indicate a condition that will be executed by default if all of the other if operators are false. As above, only one of the conditions will be executed: if(Condition1 == true) // Execute condition 1 else if(Condition2 == true) // Execute condition 2 else { // Execute condition 3 if 1 and 2 are false } If you have multiple if operators without any else operators, each one will be executed if it is true – it doesn't matter whether the subsequent if statement is true or false: if(Condition1 == true) // Execute condition 1 if(Condition2 == true) // Execute condition 2 Relation Operations We begin evaluating true and false conditions by comparing values using greater than, less than, equal to, not equal to and so on. Here's a list of relation operations: • == Equal To – If x == y, the condition is true. • > Greater Than – If x > y, the condition is true. • < Less Than – If x < y, the condition is true. • >= Greater Than or Equal To – If x >= y, the condition is true. 104
Order Conditions and Indicators • Indicator2) If either BooleanVar1 is equal to true, or Indicator1 is greater than Indicator2, the statement is evaluated to true. If both of these conditions are false, the statement evaluates to false. You can combine AND and OR operations to create more complex trading conditions. When doing so, use parentheses to establish the order of operations. 105
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Expert Advisor Programming Creating
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Table of Contents Introduction 1 Ab
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Custom Indicators and Scripts 146 B
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EXPERT ADVISOR PROGRAMMING About Th
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EXPERT ADVISOR PROGRAMMING Chapter
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EXPERT ADVISOR PROGRAMMING MetaEdit
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EXPERT ADVISOR PROGRAMMING If you'r
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EXPERT ADVISOR PROGRAMMING Once a v
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EXPERT ADVISOR PROGRAMMING int Open
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EXPERT ADVISOR PROGRAMMING There is
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EXPERT ADVISOR PROGRAMMING #define
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EXPERT ADVISOR PROGRAMMING Other Fu
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EXPERT ADVISOR PROGRAMMING OrderSen
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EXPERT ADVISOR PROGRAMMING OrderSen
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EXPERT ADVISOR PROGRAMMING In this
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EXPERT ADVISOR PROGRAMMING This fun
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EXPERT ADVISOR PROGRAMMING Calculat
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EXPERT ADVISOR PROGRAMMING If you w
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EXPERT ADVISOR PROGRAMMING • Orde
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EXPERT ADVISOR PROGRAMMING OrderSel
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EXPERT ADVISOR PROGRAMMING if(Order
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EXPERT ADVISOR PROGRAMMING above th
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EXPERT ADVISOR PROGRAMMING } if(Buy
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EXPERT ADVISOR PROGRAMMING For thes
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EXPERT ADVISOR PROGRAMMING double M
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EXPERT ADVISOR PROGRAMMING AccountE
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EXPERT ADVISOR PROGRAMMING else if(
Page 62 and 63: EXPERT ADVISOR PROGRAMMING We check
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Page 66 and 67: EXPERT ADVISOR PROGRAMMING // Lot s
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Page 70 and 71: EXPERT ADVISOR PROGRAMMING // Delet
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Page 80 and 81: EXPERT ADVISOR PROGRAMMING bool Ver
Page 82 and 83: EXPERT ADVISOR PROGRAMMING // Error
Page 84 and 85: EXPERT ADVISOR PROGRAMMING extern d
Page 86 and 87: EXPERT ADVISOR PROGRAMMING We begin
Page 90 and 91: EXPERT ADVISOR PROGRAMMING OrdersTo
Page 92 and 93: EXPERT ADVISOR PROGRAMMING Let's mo
Page 94 and 95: EXPERT ADVISOR PROGRAMMING To close
Page 96 and 97: EXPERT ADVISOR PROGRAMMING // Error
Page 98 and 99: EXPERT ADVISOR PROGRAMMING double P
Page 100 and 101: EXPERT ADVISOR PROGRAMMING Updating
Page 104 and 105: EXPERT ADVISOR PROGRAMMING double i
Page 106 and 107: EXPERT ADVISOR PROGRAMMING Let's ta
Page 108 and 109: EXPERT ADVISOR PROGRAMMING We'll us
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Page 116 and 117: EXPERT ADVISOR PROGRAMMING if((fals
Page 118 and 119: EXPERT ADVISOR PROGRAMMING Here's a
Page 122 and 123: EXPERT ADVISOR PROGRAMMING Next, we
Page 124 and 125: EXPERT ADVISOR PROGRAMMING extern b
Page 126 and 127: EXPERT ADVISOR PROGRAMMING from M1
Page 128 and 129: EXPERT ADVISOR PROGRAMMING You shou
Page 134 and 135: EXPERT ADVISOR PROGRAMMING // Prepr
Page 138 and 139: EXPERT ADVISOR PROGRAMMING case 138
Page 140 and 141: EXPERT ADVISOR PROGRAMMING Margin C
Page 142 and 143: EXPERT ADVISOR PROGRAMMING extern i
Page 144 and 145: EXPERT ADVISOR PROGRAMMING specifie
Page 146 and 147: EXPERT ADVISOR PROGRAMMING OrderSel
Page 148 and 149: EXPERT ADVISOR PROGRAMMING We use M
Page 150 and 151: EXPERT ADVISOR PROGRAMMING we need
Page 152 and 153: EXPERT ADVISOR PROGRAMMING // Place
Page 156 and 157: EXPERT ADVISOR PROGRAMMING Next are
Page 158 and 159: EXPERT ADVISOR PROGRAMMING The SetI
Page 160 and 161: EXPERT ADVISOR PROGRAMMING // start
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EXPERT ADVISOR PROGRAMMING Appendix
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EXPERT ADVISOR PROGRAMMING } return
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EXPERT ADVISOR PROGRAMMING // Sell
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EXPERT ADVISOR PROGRAMMING string E
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EXPERT ADVISOR PROGRAMMING ClosePri
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EXPERT ADVISOR PROGRAMMING // Get S
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EXPERT ADVISOR PROGRAMMING // Calcu
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EXPERT ADVISOR PROGRAMMING MinStop
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EXPERT ADVISOR PROGRAMMING // Close
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EXPERT ADVISOR PROGRAMMING extern i
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EXPERT ADVISOR PROGRAMMING if(BuySt
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EXPERT ADVISOR PROGRAMMING int Open
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EXPERT ADVISOR PROGRAMMING double A
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EXPERT ADVISOR PROGRAMMING int BuyS
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EXPERT ADVISOR PROGRAMMING void Clo
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EXPERT ADVISOR PROGRAMMING } } } st
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EXPERT ADVISOR PROGRAMMING double P
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Index A AccountBroker() ...........
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OrdersTotal() .....................
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