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want to create a serial key for my ea that works only in one account per serial key

Good Day Friend, I'm having a challenge Try to Create Serial key for my new ea, a serial key that work one only one account per serial key. I got this example from mql4 code base but it doesnt show how on serial key is restricted to one account here is the code

An EA that Open Buy and Sell Order according to the step Range

Please can any one help me fix this problem? I'm to build an EA that Opens Buy and Sell Position according to the RS_Step,that means if the Step is 10pips the EA Opens a buy and a Sell trade every 10pips move, I tried writting it but the problem I'm having is : its opens only one buy and one sell

Array out of Range with My Grid Line indicator

Good day Guys, can any one help me fix this problem? I'm trying to build a Grid Line Indicator and its saying Array is out of Range . Here is the source Code : #property strict #property indicator_chart_window #property indicator_buffers 1 #property indicator_color1 clrWhite extern double RSMAX=

can anyone convert this gridline indicator to array?

Hey Guys, From the teachings in this forum and personal excersice i have discovered how to build a grid indicator, But there is a little problem Im having : building the indicator as a single variable it worked correctely but when i tried to convert each grid line into individual element

how to calculate the price values of the vartical scale of the chart in mql4 plaform

Good day guys, there is one little favor i want to ask from you guys,I'm trying to build an ea that open pending orders on vertical scale of the price values in a windows chart, the vartical scale in mt4 consist of 11 values on the right hand side of the chart,please can anyone show show me how to