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Omais Ali2d ago • 4 min read
Why your MQL5 EA reads zero or garbage from indicators on the first ticks
A bug I see in many MT5 Expert Advisors looks like a strategy problem at first. The EA opens a trade...
#mql5#programming#algotrading#tutorial
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Omais Ali6d ago • 2 min read
OrderSend returned true, so where is my trade? Checking results properly in MQL5
A very common bug in MT5 Expert Advisors: the code calls trade.Buy(...), it returns true, and the EA...
#mql5#programming#algotrading#tutorial
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Omais Ali4d ago • 2 min read
Detecting a new bar in MQL5 without missing one or firing twice
Most Expert Advisors make their decisions once per bar, not on every tick. That sounds simple, and.....
#mql5#programming#algotrading#tutorial
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Omais Ali5d ago • 2 min read
Why your MQL5 lot size gets rejected, and how to normalize volume and prices properly
A risk based lot calculation almost never produces a valid number. You compute 0.4372 lots, send it,...
#algotrading#mql5#programming#tutorial
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Karan Rajput3d ago • 2 min read
Pine Script to MQL5: the three timing bugs that make an EA trade differently
A Pine Script strategy and its MQL5 version can use the same indicators and still trade on different...
#tradingview#mql5#algotrading#metatrader
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Omais Ali20h ago • 3 min read
Detecting stale quotes in an MQL5 Expert Advisor before you trade on them
An Expert Advisor only ever sees the last price the terminal received. Most of the time that is fine...
#mql5#programming#algotrading#tutorial
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Omais Ali3d ago • 3 min read
Why your multi symbol MQL5 EA misses trades on every symbol except the chart one
A common request I get is "one EA, attached to one chart, trading eight pairs". It is a good design,...
#mql5#programming#algotrading#tutorial
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Omais Ali1d ago • 3 min read
Knowing why a position closed in MQL5 with OnTradeTransaction
A common question in Expert Advisor code is "did my trade just hit its stop loss, its take profit, o...
#mql5#programming#algotrading#tutorial
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Arnold Holm18h ago • 4 min read
MT5 error 10004: a requote is not a reason to retry forever
Your EA needs a stop condition after a requote. My policy example compiled with 0 errors; it sends n...
#mql5#metatrader#debugging#programming
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Arnold Holm5d ago • 3 min read
MT5 filling flags are not your order filling policy
Your EA can put the wrong filling policy into a perfectly valid integer. My MT5 run passed 6 local.....
#mql5#debugging#tutorial#algotrading
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Arnold Holm6d ago • 3 min read
MT5 return code 10006: keep the result before retrying
Your bot can receive a result without a fill. My MT5 run passed 3 synthetic return-code checks and.....
#mql5#debugging#tutorial#algotrading
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Arnold Holm1d ago • 3 min read
MQL5 error 4806: keep missing indicator data out of your signal
My guarded indicator reader compiled with 0 errors, but that proves no working signal on your...
#mql5#trading#programming#debugging
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Arnold Holm4d ago • 3 min read
MQL array out of range: check 3 values before reading a buffer
MQL array out of range: check 3 values before reading a buffer Your indicator cannot read...
#mql5#debugging#testing#algotrading
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