Multiple Position Opening MT4

The Multiple Position Opening is a multi-symbol multi-timeframe script used to open simultaneously various positions. 

Risk Management 

The volume used to open a position is chosen between a fixed and a variable lot size, available through the Volume and Free Margin % input parameters, respectively. If there isn't enough money in the account for the chosen volume, this is reduced to the highest possible value (corresponding to free margin). If this reduction leads to a correct volume (if the free margin is enough, at least, for the minimum volume allowed by the broker), a request for opening the position is sent to the trade server; otherwise, the request isn’t sent. 

Input Parameters 

• Magic Number: Script’s identifier. 
• Type: Position type used. 
• Volume: Lot size per deal (lots). 
• Free Margin %: Percentage of account free margin used to calculate the lot size per deal (%). 
• Stop Loss: Distance from the market price for placing a Stop Loss at a position opening (pips). 
• Take Profit: Distance from the market price for placing a Take Profit at a position opening (pips). 
• Deviation: Maximum allowed slippage from the requested price (pips). 
• Comment: Text message displayed in the Trade or Account History tabs of the Terminal window and Objects list after opening a position (it only allows 31 characters).
• Total: Positions number to be open. 

Some of the available parameters accept values that lead to particular options. 

• Volume: A value lower than the minimum allowed volume by the broker is converted in this last. A value higher than the maximum available volume by the free margin is converted in this last. 
• Free Margin %: A value whose volume doesn't reach the minimum allowed volume by the broker is converted in this last. A value whose volume exceeds the maximum available volume by the free margin is converted in this last. 
• Stop Loss or Take Profit: A null value means the parameter’s inactive function. Any value between 0 and the Stop Level is converted in this last. 

Displayed Information 

The script possesses a vast number of messages to inform the user about errors and conditions changes that might occur during its execution. The messages are shown through the Alert function (by a pop-up window), its content includes: 

1. The warning that an input parameter has been incorrectly set. 
2. The info that the account doesn't have enough money for the chosen volume (see the Risk Management section above). 
3. The info that the number of permitted orders by the broker has been reached. 
4. The Trade Server Return Codes description. 
5. The symbol’s quotes (immediately) before the trade request’s formation, followed by the symbol’s quotes (immediately) after the trade server’s decision. 

Note: Some elements of the list are displayed simultaneously (in the same text line): 4 and 5.