EA written to use custom indicator & PSAR

EA Specifications

• The EA should control only its own positions and shouldn't deal with positions opened manually or by other EAs.
• The indicators to be used for the EA is the NLMA (custom indicator) and PSAR.
• If there are no positions opened by the EA:
• when the NLMA changes to BLUE, check PSAR for current trend and open a Buy-position if consistent with trend otherwise do nothing;
• when the NLMA changes to RED, check PSAR for current trend and open a Sell-position if consistent with trend otherwise do nothing;
• If there is a position already opened by the EA:
• if it is a Buy-position:
• if the NLMA changes to RED and the PSAR indicator is underneath, then Buy-position is closed and a Sell-position is opened;
• if it is a Sell-position:
• if the if the NLMA changes to BLUE and the PSAR indicator is displayed above then Sell-position is closed and a Buy-position is opened.
• Indicator values are taken from a chart period, on which the EA works.
• Position size is determined by an external variable. Give the option of using a set Lot size or a % of the current account balance which can be entered manually.
• If an error occurs, the EA should display a window with the error information and retry the attempt on the next tick.
• Need to be able to stop the EA when the next trade closes.
• Need an emergency CLOSE TRADE NOW option.
• Only 1 trade open at a time.
• Do I need to specify my brokers time zone? Eg GMT+3
• Give an alert when the NLMA changes colour.
• Be able to specify session times and trade in 1 or more sessions. Eg Asian, UK

At this stage I plan on using it on 1 currency pair/at a time.  If it works well I will add the possibility of several different assets at a time.  Keep this in mind for future alterations.

"This is my 1st attempt at specifying an EA.  If you can see any faults or other items I should include, please let me know in the negotiating stage."