Hoping that a trade will eventually turn around in your favor is a true "recipe for disaster" (everyone likes this expression today
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The strategy you've described makes sense in terms of setup and also creates some interest too as a general idea (for digging deeper and possibly discovering a new scalping method).
In terms of application, I'd add the rule that the entry should be maid withing the next 3 candles (means withing the next 45 minutes), otherwise cancel the order.
Also, the histogram I used while checking this strategy was not a default MT4 MACD histogram, but a custom one. The file is attached.
Also see the screenshot for the strategy attached.
My
Midnight Forex strategy is really good during trends, but would cause troubles during range bound periods. Plus its stop loss levels are quite distant since we're dealing with daily candlesticks, so you have to get used to risk 100 pips on average, plus you need to keep your lot size managed according to the size of your account balance, otherwise you'll soon get in trouble should the market decide to move against you claiming -100 pips for several days in a row.
Best regards,
Edward