Raw spread accounts are the cheapest trading environment retail has ever had. On EURUSD and AUDUSD the advertised spread starts at 0.0 pips, the average sits near 0.1, and the median tick in our own broker data really is zero. Commission is 3.50 USD per lot per side. A grid vendor can print that on the product page and every word of it is true. It is also close to irrelevant, because spread and commission are the smallest numbers in the grid equation. The two numbers that decide the outcome are the swap line and the trend, and neither one shows up in a spread table.
A grid holds losing baskets open for weeks and pays financing on every one of those nights. That cost has nothing to do with the spread at entry. Our measured runs put numbers on it. In the Logan audit, a grid that averages into adverse moves, commission over the full run is -167.54 USD and swap is -6,448.44 USD. The financing line is roughly 38 times the commission line. In the Quantum Queen X audit the same ordering holds at smaller scale, swap -349.87 USD against commission -268.56 USD. A strategy that buys time pays for time, and no raw spread account discounts that bill.
The median spread is measured at the wrong moment anyway. The median tick is quiet mid session, exactly when a grid needs nothing. Spreads widen at the daily rollover, around news, and across weekend gaps, and those are precisely the moments when a loaded basket gets its worst prints. A cost figure sampled when nothing happens says little about a strategy that concentrates its risk into the moments when everything happens.
The real bill is geometric, and it needs no backtest, only public price history. Take a grid that buys EURUSD every 20 pips into a falling market, 0.01 lots per step, where one pip is worth 0.10 USD. From January 2021 to September 2022 the pair slid from about 1.2349 to about 0.9536, a move of roughly 2,813 pips. Into that slide the grid accumulates just over 140 positions, on average about 1,400 pips underwater each. The basket floats at roughly 19,800 USD below water per 0.01 lot step. A rescued 20 pip cell earns 2.00 USD, so the one slide costs the equivalent of about 9,900 winning cells. Commission on a cell is 0.07 USD. Set the spread to zero, set the commission to zero, and you have removed three and a half percent of the win side while the loss side stands untouched.
The survival condition is simple arithmetic. A slide of T pips against spacing of g pips floats about T times T divided by (20 times g) dollars per 0.01 lot step. Turn it around and the spacing that survives with a buffer of B dollars is T times T divided by (20 times B). Against the 2021 to 2022 slide of 2,813 pips, a 1,000 USD account needs spacing near 400 pips. Against the May 2014 to March 2015 slide from about 1.3993 to 1.0457, which is roughly 3,536 pips, it needs about 630 pips. A 10,000 USD account gets away with about 40 and 63 pips. And AUDUSD holders faced a longer road still, from the 2011 high near 1.1080 to the March 2020 low near 0.5506, more than 5,500 pips.
Now the tester side of the same arithmetic. On a 100,000 USD frame with 0.01 lot steps, even a 7 pip grid survives both EURUSD slides on paper. That is why our protocol runs a deep measurement frame on purpose, to show the complete uncensored trade sequence. It is also why a silky balance curve on such a frame is not a survival statement about any account a vendor actually recommends. The curve and the account live on different planets, and the audit exists to put them back on one.
Doubling the lots doubles the harvest and doubles the floating loss. The ratio between them never moves, so there is no lot size at which a grid becomes safe, only account sizes that hide the tail longer. The spacing dial is worse than neutral. Halving the spacing lets the grid harvest smaller swings, and it exactly doubles the floating loss of the same trend. The dial that raises the income raises the tail faster. That is the whole trade, sold in reverse order on every product page.
The pattern is not hypothetical. Logan made money in twelve of its thirteen traded years and still finished at -24,334.65 USD, because the year 2016 closed at -30,247.94 USD, attributed by the audit to a single trading day. Twelve years of harvest, one day of geometry. Quantum Queen X prints a tester profit factor of 4.66 with the classic impossibly smooth balance curve, and its structure forensics flag averaging into adverse moves in red. Quantum Athena X was offered 23 years of ticks and placed its first trade in January 2018, so the marketed record never met the 2014 slide at all. Our grid measurements run on gold ticks, and the geometry does not care. Pips, points or dollars per ounce, the equation is the same.
The verdict lamps for every grid EA we have measured are public on the category page, the deal level evidence sits in the audits. Your own tester report? The browser check is free.