This EA trades a weekly gap, opening trades on the Friday before the market close and closing trades on Monday morning. This strategy do not contain grid and martingale elements.
I have been using this strategy for a long time with my "Breakthrough Strategy" EA. I intentionally did not over-optimize the sets for "Breakthrough Strategy", as they have been showing good results for a long time on a real account: https://www.mql5.com/en/signals/395124 .
The sets are already built into the EA, so you just need to attach the EA to the chart of a currency pair of any timeframe (the result will be the same, the EA itself takes the required timeframes). Or to quickly set up all the charts with an expert, use the profile from comment #17.
Let's see which sets perform better (old for "Breakthrough Strategy" or new for "Friday Monday"). I will combine them on one account to average the result and get more transactions in total. The "Breakthrough Strategy" and "Friday Monday" Expert Advisors are configured to see each other's trades and thus not open a trade if another Expert Advisor has already opened a trade on this currency pair *. This will protect the account from an excessive number of transactions.
* Sometimes, trades from both experts on the same pair will still be opened, when the opening of trades is too close in time, which does not allow determining a trade in the market in a timely manner. But this will rarely happen.
There is also a limit on the total number of transactions for all pairs of all experts. I set this number to 27 since 26 currency pairs are used (for EURUSD I have set 2 open trades).
Currency pairs: EURUSD, GBPUSD, USDCHF, AUDUSD, USDCAD, NZDUSD, USDSGD, EURGBP, EURJPY, EURCHF, EURAUD, EURCAD, EURNZD, GBPJPY, GBPCHF, GBPAUD, GBPCAD, CHFJPY, CADJPY, NZDJPY, AUDCHF, CADCHF, AUDNZD, NZDCAD.