invalid volume error

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hello every one, can you please support me by an orientation in my programation of a new trading robot in market! the [invalid volume] make me insane.

i find this code but in vain. the error is always aappearing at the final of rapport

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can you help me please to find out the problem

Documentation on MQL5: Constants, Enumerations and Structures / Environment State / Symbol Properties
Documentation on MQL5: Constants, Enumerations and Structures / Environment State / Symbol Properties
  • www.mql5.com
Symbol Properties - Environment State - Constants, Enumerations and Structures - MQL5 Reference - Reference on algorithmic/automated trading language for MetaTrader 5
 
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