2 min read · Six principles worth knowing before your first trade.
Level:
Words in this lesson (9)
Stop — A price chosen in advance at which the trade is closed at a loss, so the loss doesn't grow bigger.
Spread — The difference between two prices. In the order book — between the best bid and the best ask. In arbitrage — between the price of the same asset on two venues.
Arbitrage — Making money on the price difference of the same thing in two places: buy where it's cheaper, sell where it's more expensive.
Funding — A regular payment between those who are long and those who are short on a perpetual futures contract. Who pays depends on whether the futures price is above or below spot.
Volume — How much money or how many units changed hands over a period. A move on high volume is more reliable than one on low volume.
Screener — A filtering program: it scans hundreds of stocks or coins and shows only those that match the given criteria.
Slippage — The difference between the price you saw and the price at which the trade was actually filled.
Fee — What you pay the exchange for every trade — both on entry and on exit.
DEMO — The DEMO account in MAMAY: prices and fees are real, orders don't go to the exchange, and no real money is at risk.
3. Signals are checked automatically
Every signal is written to a journal, and its outcome is graded later. "Signal performance" shows the result for each screener and setup; for stocks — with a note on which screeners overlapped at the moment of the signal.
4. Arbitrage is calculated from the order book
"Best NET" is the average fill price of the recommended size, minus the fees of four trades, minus slippage, plus funding. "Worst NET" — funding set to zero, slippage doubled. In "Positions" — the executable spread versus breakeven, not the average one.
5. A scenario moves into the panel in full
"Accept scenario": order type, entry, stop, target, risk-based size. The side button lights up; an order against the scenario needs a second click.
6. DEMO is the same engine, without real money
Fills at live prices, real fees, a separate account. DEMO and REAL history never mix. Real transfers have a separate switch and go only to whitelisted addresses.
The mentor
On every screen there's a "Mentor" button (powered by your AI: Claude, ChatGPT, Gemini, DeepSeek and others, or a model on your own computer; you can connect the profile of your own trained agent). It knows the screens and lessons, can receive a screenshot and, with your permission, your trades. It doesn't reveal how the screeners work inside.
These lessons live inside the MAMAY terminal. There they come with a mentor powered by your AI that explains the screen you have open right now, reviews of your trades, and everything hidden on the site: screener rules, settings and live examples. Learning and manual trading are free.
