Hassilium

Hassilium is a mean reversion Expert Advisor designed to run on EURUSD and GBPUSD at the same time, one chart each, with a shared risk desk between the two instances. The pairs move alike but not identically, so a setup that narrowly misses the trigger on one chart is often caught by the other. When both charts trigger in the same direction at once, the desk treats it as the same US dollar position taken twice and caps the combined exposure instead of doubling it.

How the engine trades

The engine works on M15 data regardless of the chart timeframe. It sells when RSI(7) closes above its ceiling and buys when it closes below its floor. Every position opens with a take profit and a stop loss at 1.5 times ATR(14). When a trade closes at its take profit, the engine can open an opposite trade that inherits the parent's stop distance, trading the swing back without waiting for a new signal. Position risk adapts to results, scaling up after a win and down after a loss between a floor and a ceiling.

Several protections run at all times: a regime guard that pauses trading after a losing window, a reset after a losing streak, a cooldown after each loss, a daily trade cap, a spread filter measured relative to ATR, and a news filter based on the built-in economic calendar. The news filter fails open, so a calendar outage never blocks trading.

The shared desk

Attach the EA to both charts with the same Desk ID and the instances coordinate through the terminal. The desk enforces three configurable ceilings: the total simultaneous risk of the desk as a percent of equity, the net exposure per currency in lots, and a shared daily loss stop that halts new entries for the whole desk until the next day. The coordination fails open, meaning a single instance or a Strategy Tester run simply applies the ceilings to itself alone.

Automatic calibration

The AUTO profile calibrates each chart from measured results. On EURUSD it enables both cascade directions at ratio one to one. On GBPUSD it trades shorts only with the long cascade only, inside an entry window from 05:00 to 14:00 New York time, without a forced daily close. On any other symbol the EA uses the inputs exactly as you set them and never refuses to trade a symbol. A Manual profile disables all automatic calibration, and an optional ratio memory can learn per side whether a cascade performs better at full size, at half size, or not at all.

Recommended use

Run the EA on EURUSD and GBPUSD, one chart each, on any chart timeframe. A hedging account is recommended and netting is supported. Suggested leverage is 1:100 or higher with a minimum deposit around 1000 units of the account currency or an equivalent cent account. The default inputs are the tested configuration. Before going live, run your own Strategy Tester pass on your broker's data, since results depend on spread, commission and server timezone. Set the two server offset inputs to your broker's UTC offset for summer and winter; the defaults fit common EET brokers.

What this EA does not do

There is no martingale, no grid and no averaging down, and every position carries a real stop loss and take profit from the start. Everything runs inside the terminal without external services. No Expert Advisor can guarantee profits, and past performance, live or tested, does not guarantee future results.

Support is provided through the Comments section of the product. Set files for both pairs are posted there after every update.