Idea by: Dmitry

mq5 code by: barabashkakvn

The Expert Advisor uses indicator iMA (Moving Average, MA). It has many settings:

• Only one positions - only one position can be held in the market
• Reverse - reversal of trading signals
• Close opposite - forcedly closing opposite positions when receiving a trading signal

Generating trading signals, where all parameters are set by default:

The current ASK price is higher than the indicator value on bar #1 -> a signal to open a BUY position

The current BID price is lower than the indicator value on bar #1 -> a signal to open a SELL position

And how it looks in the MQL5 code:

      if(m_symbol.Ask()>ma[1])           m_need_open_buy=true;        else if(m_symbol.Bid()<ma[1])           m_need_open_sell=true;  

A sample of how it works where parameters of Only one positions are false and true:

The next sample of Only one positions - true, Reverse - false, and Close opposite - true: A BUY position was opened, and then a signal for opening a SELL position was received. Since Close opposite - true, then the BUY position was closed first (as it was opposite to the signal) and only after that the SELL position was opened.