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Komut dosyaları

Risk-Based Lot Size Calculator - MetaTrader 5 için komut dosyası

ALI RAJPUT
Yayınlayan:
Rana Ali
Rana Ali

Rana Ali

  • MQL5 Developer & Algorithmic Trading Specialist at  Freelance
  • Pakistan
  • 183
Hi, I'm Ali. 24 years old, trading for around 5 years, and developing MQL5/MQL4 tools. I mainly work on automating manual strategies, fixing broken EA logic, and building clean indicators. I care more about clean architecture and proper risk management than over-complicated code. Always down to talk
3 kod 2 yorum
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100
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(1)
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MQL5 Freelance Bu koda dayalı bir robota veya göstergeye mi ihtiyacınız var? Freelance üzerinden sipariş edin Freelance'e git


The Risk-Based Lot Size Calculator is a lightweight MQL5 script that removes the guesswork from position sizing. Instead of manually working out how many lots to trade, you enter a risk percentage and a stop loss distance, and the script instantly reports the correct lot size for the current symbol and account balance.


Many traders lose money not because their strategy is wrong, but because their position size is wrong. Risking too much on a single trade can damage an account even with a good strategy, while risking too little limits growth. This script ties position size directly to a fixed percentage of account risk, so every trade carries a consistent, controlled amount of risk.

External variables used:
InpRiskPercent - the percentage of account balance you are willing to risk on the trade (default 1.0%).
InpStopLossPips - the distance between entry price and stop loss, measured in pips (default 20 pips).

How it works: the script reads the current account balance together with the selected symbol's tick value, tick size and volume constraints (minimum lot, maximum lot, lot step). It then works out the lot size needed so that, if price moves against you by the specified number of pips, the loss equals the chosen risk amount. The result is rounded down to the nearest allowed lot step and clamped between the broker's minimum and maximum volume. The final lot size, together with the full calculation breakdown, is shown on the chart and printed to the Experts log.

Because it reads live broker parameters instead of relying on hard-coded pip values, the script works on any symbol and any account type. Simply attach it to a chart, enter the risk percentage and stop loss in pips, and read the suggested lot size from the chart comment.
Correlation-Aware Lot Size Calculator Correlation-Aware Lot Size Calculator

Sizes your next trade based on the correlated risk you already have open across other positions — not just the trade in isolation.

Prop Firm Rule Checker Prop Firm Rule Checker

Checks your trade history against common prop-firm challenge rules — profit target, max daily loss, max drawdown, consistency rule, and minimum trading days — with a clear PASS/FAIL report.

Server Time Offset: the three clocks in MQL5 and how timestamps shift on export Server Time Offset: the three clocks in MQL5 and how timestamps shift on export

A datetime in MQL5 is seconds since 1970 - but server time (TimeCurrent, bar times, deal times) is the broker's wall clock stored AS IF it were UTC. Export it to CSV, read it in Python or a spreadsheet with a "seconds since 1970 UTC" parser, and every timestamp shifts by the server's UTC offset. On a UTC-3 broker that is three hours: the daily bar dated 00:00 reads as 21:00 of the previous day, and "yesterday's session" silently becomes "today's, half formed". That happened to a morning report of mine before this script existed. The script prints TimeTradeServer, TimeCurrent, TimeGMT and TimeLocal, the three offsets between them, the tick lag, and this chart's last bar time in server time and in real UTC - then states the rule: export server timestamps as wall-clock text, or export the epoch together with the offset, and never let the consumer apply its own timezone.

Exposure Cap: one position limit per symbol across all your EAs Exposure Cap: one position limit per symbol across all your EAs

Four EAs on the same symbol, each one honest on its own: each checks "do I have a position?" with its own magic number, sees none, and enters. On a demo account this reached 22 contracts on a symbol meant to carry 1, and a watchdog had to close 16 positions in one morning. The cap belongs at the door, not after the fact. ExposureCap::Allowed(symbol, lots, cap) sums the volume of every open position on the symbol - all magic numbers, manual trades included - and refuses the order BEFORE it is sent when it would breach the cap. One log line with the three numbers (held, requested, cap) says why. Deliberately simple: gross exposure, no netting of longs against shorts, no per-EA quota. It is a check, not a lock: two EAs deciding on the same tick can both pass; in practice EAs on different charts decide on different ticks. The demo script prints held / cap / room for the current symbol and shows the refusal line. Nothing is traded.