The core problem
A strategy often accumulates years of research decisions inside one platform: session handling, data choices, indicators, portfolio logic and order assumptions. Reimplementing all of this solely because the destination account uses MT5 introduces a new source of model risk.
A bridge can be cleaner than a rewrite
Keeping MultiCharts as the source of truth reduces duplication. MT5 does not need to understand why the model decided to trade; it needs to validate a controlled instruction and manage the destination order according to broker and account rules.
What still has to be validated
Platform separation does not remove the need for comparison. Source and destination symbols can have different prices, sessions, contract values and minimum sizes. Network latency, spread filters and terminal state also affect the result.
- Source event time versus destination order time
- Position state before and after every instruction
- Broker symbol, tick size and lot step
- Netting or hedging account mode
- Duplicate handling after a restart or reconnect
- Slippage and rejected-order logging
When this architecture makes sense
It is most useful when the existing MultiCharts model is already tested and the primary constraint is account compatibility: multiple MT5 brokers, CFD accounts, prop environments or a broker-side terminal that cannot run the research code directly.
Practical conclusion
Research and execution are different responsibilities. Separating them can make the workflow easier to maintain and diagnose, provided that the interface between the two is explicit, monitored and tested under realistic conditions.
This note describes software architecture. It does not endorse a broker, prop firm or trading strategy and does not guarantee order execution or investment performance.
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