A! The Unpaid Intern


Of course. Based on your handwritten notes and the description, you are looking for a semi-automated Expert Advisor (EA) for MetaTrader. This EA acts as a trade and risk manager, implementing a grid-based averaging strategy (often called a "layering" or "averaging down" strategy) that is initiated by a manual trade.
The goal is to manage a losing trade by opening subsequent trades in the same direction at set intervals, with the aim of closing the entire basket of trades in profit when the price retraces slightly.
Here is a detailed breakdown of the logic, the required inputs, and a conceptual code structure, followed by a critical risk warning.
EA Logic Breakdown
This EA will not open the first trade. It will monitor the account and "take over" management once a trader opens a manual position.
1. Initial State: Monitoring
The EA is idle, waiting for a manual trade to be opened on the chart it's attached to.
It identifies a manual trade by checking for positions that do not have its unique MagicNumber.
2. Trigger: Manual Trade Detected
When a trader opens a manual BUY or SELL trade, the EA identifies it.
The EA immediately assigns its MagicNumber to this trade (or simply starts tracking it by its ticket number) and applies the initial TakeProfitPips if one is set.
3. Negative Float Condition (The Grid Step)
The EA continuously monitors the floating profit/loss of the position(s) it is managing.
For a BUY trade: If the current price drops below the entry price of the most recent trade by the amount specified in GridStepPips, the layering condition is met.
For a SELL trade: If the current price rises above the entry price of the most recent trade by the amount specified in GridStepPips, the layering condition is met.
4. Layering Action: Open New Trade
When the condition in step 3 is met, the EA will:
a. Check Margin: It verifies that there is enough free margin to open a new trade. Your request to "use all margin" means it will continue opening trades as long as it is technically possible.
b. Open New Trade: It opens a new trade in the same direction (BUY or SELL) with the specified LotSize. This new trade is assigned the EA's MagicNumber.
c. Recalculate and Modify TP: The EA calculates the new average entry price for all open trades in the basket (all buys or all sells). It then modifies the Take Profit (TP) level on all open trades in the basket to a single, unified price. This TP is calculated from the average entry price plus the TakeProfitTargetPips or based on the TakeProfitTargetCurrency.
5. Repeat
The EA repeats steps 3 and 4, adding a new layer each time the price moves another GridStepPips against the position, continuing until either the Take Profit is hit or a margin call occurs.
6. Take Profit Condition
The EA monitors the total floating profit of the entire basket of trades.
If the total profit reaches the target (TakeProfitTargetPips from the average price or TakeProfitTargetCurrency in dollars), the EA will close all trades in the basket simultaneously.
Required EA Inputs (Parameters)
To make this flexible, the EA should have the following user-configurable settings:
LotSize: The fixed lot size for all automatically opened trades. (e.g., 0.01).
GridStepPips: The number of pips in negative float that triggers a new layer. (e.g., 10 pips).
TakeProfitTargetPips: The final take profit for the entire basket, measured in pips from the average entry price. (e.g., 10 pips).
TakeProfitTargetCurrency: An alternative TP, in your account's currency (e.g., $5.00). The EA will close the basket when the total profit exceeds this amount.


UseCurrencyTP: A true/false switch to choose between TakeProfitTargetPips and TakeProfitTargetCurrency.
MagicNumber: A unique number so the EA only manages its own trades and doesn't interfere with other EAs.
CRITICAL RISK WARNING: "Full Margin" Strategy
Your notes mention "F Margin" (likely Free Margin) and "MCALL" (Margin Call), and your request is to "layer non stop" and "use all margin".
This is an extremely high-risk strategy that can lead to a 100% loss of your account balance.
How it works: This strategy relies on the market eventually retracing. In a strongly trending market (e.g., after major news or a market shift), the price can move in one direction for hundreds of pips without a significant pullback.
The Danger: Your EA will continue opening new trades, increasing your exposure and your required margin with each new layer. Eventually, your Free Margin will run out. When this happens, your broker will issue a Margin Call, and your largest losing position(s) will be forcibly closed to free up margin. This often leads to a cascade of closures that wipes out your entire account.
Recommendation: To make this strategy safer, you MUST add a safety-net parameter:
MaxLayers: An input that defines the maximum number of trades the EA is allowed to open. For example, setting MaxLayers = 10 would prevent the EA from blowing up your account in a runaway trend.
Without a MaxLayers limit, it is not a question of if this strategy will fail, but when. Please be extremely careful and test this extensively on a demo account before considering live use.