Mike Smith (MSc, PGdipEd)
Client Education and Training
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The decision to scale (increase the traded lot size of a specific EA) should be based on statistical evidence that indicates your EA has the potential to perform to certain expectations.
Equal weight should be given to the decision to scale, as to the initial decision to deploy an EA. This guide provides an indicative approach on how to put together and action your scaling plan.
Before You Start Your Scaling Plan
Important: this should be an individual plan that is consistent with your personal trading objectives, your EA portfolio, and your personal financial situation (including account size).
We are going to use a starting lot of 0.10 per trade in the examples in this document —you want to adjust this based on your own risk tolerance.
Whatever your chosen lot size start point, EA scaling should be a pre-planned incremental approach, scaling stepwise based on performance metrics you are seeing in your live trading account.
You should also have assessed the current margin usage of your EA portfolio exposure to ensure that any scaling and related increased margin requirements are appropriate to the size of your account.
Suggested Scaling Baseline Requirements
Scaling should only be performed when your EA is performing to what you deem to be a good standard. To make this judgment, you need to set some minimum performance standards.
The past performance of your EA is not a guarantee of future performance. If market conditions change, you must remain vigilant and continue to measure performance on an ongoing basis for every live EA you have.
You need to define the key metrics that are important to you.
Two important metrics to include are:
The number of trades: to provide some evidence of reliability
The period of time: to have had exposure to at least some variation in market conditions
Example of how you may lay your metrics out in a table:
Table 1 – Sample scaling metrics
Some may choose to include proximity to original expectations of other metrics, such as minimum win rate, average profit in winning trades, and average loss in those that go against you.
It should only be after your metrics are met that lot scaling begins on any specific EA.
Lot Size Scaling Ladder
Below is an example of a performance-based scaling plan assuming a 0.10-lot baseline.
Again, this is indicative. It provides a framework with clear review dates and an approach that illustrates incremental scaling. You must still define a regime that is right for your specific trading objectives.
Table 2 – Review planning
Risk Guardrails
It is vital to keep an eye on your general account risks and have limits in place that guide your EA use.
Such limits must be constant across all stages of scaling and referenced beyond the risk of a single EA, but to your portfolio as a whole.:
Per-Trade Risk (Nominal)
Trade risk for any one trade should be seen in the context of account size and the dollar risk based on the risk parameters you have set for your EA.
Specify a maximum percentage of the account balance — a $200 loss is more impactful on a $1000 account compared to a $10,000 account.
Stick to what is right for you in terms ofyour tolerable risk level based on your trading objectives and financial situation. A common suggestion is a 1-2% risk of account equity per trade.
Total Open Exposure
Specifying maximum exposure in the number of EAs open at any time and those that use the same asset class is important for overall portfolio risk management.
There are tools you can use to monitor exposure risk generally, as well as those that can be used to indicate single asset exposure.
Margin Usage
It is always desirable that your set exit approaches and parameter levels are what your exits are based on. It should not be because your margin usage has meant you have moved into a margin call situation.
Specify a minimum level to adhere to and make sure that your account is sufficiently funded. If volatility or slippage rises (e.g., news events or illiquid sessions), reduce lot size temporarily.
Scaling Psychology – Managing “Big Numbers”
As lot sizes rise, your emotions may respond accordingly when you see the larger dollar amounts that your EA is generating.
If you are used to seeing an average profit of $100 and average loss of $50, and suddenly you are seeing significantly bigger numbers, it creates an emotional challenge where you may be tempted to do a “discretionary override”.
Although there are situations, such as major market events, overexposure in a specific asset, or VPS or account system problems, where such intervention may be considered, generally this would distort the actual performance evaluation of your EA and is not encouraged (unless it is pre-planned).
The table below presents some of the generally accepted challenges and offers suggestions on how to manage them.
Your Plan Into Action…
In practical terms, your scaling plan should have two components:
The key parameters for action on your chosen key metrics
Specified periodic review times to make your next scaling decision
This is not a race. Having systems in place facilitates creating the opportunity that scaling brings while still mitigating the risks.
There are few trades as appealing, or as risky, as trying to catch a market reversal. The idea of entering at the turning point and riding the new trend is exciting. However, most traders fail to consistently produce good trading outcomes on this potential, often entering too early without confirmation, and thus get caught at a pause point of a continuing powerful move.Trend reversals can indeed offer excellent reward-to-risk potential, but as with any trading approach, only when approached systematically, the confluence of key factors, and timing.
What Is a High-Probability Entry?
Before diving into reversals specifically, let’s define what we mean by a high-probability entry.A high-probability entry is a trade taken in conditions where:
There is clear evidence from price action and structure
There is an alignment with the overall market context, such as timing, favourable price levels, and volatility
Risk can be logically defined and limited to within your tolerable limits
It may offer a favourable risk-to-reward profile (providing you execute following a pre-defined plan)
This approach should underpin all trading strategy development. And be consistently executed according to your defined rules, which must be constantly reviewed and refined based on trading evidence.
Reversal vs. Retracement: Know the Difference
Many traders confuse a retracement with a reversal, often with potentially costly consequences. It is ok to exit on a retracement and be ready to go again if there is a breach of the previous swing high. But this must be part of your plan, with a strategy for trend continuation in place. However, if your plan suggests that you DON’T want to exit on retracements, then the following table gives some guidance on what potential differences may be. RetracementReversalA temporary move against the trendA complete shift in directional controlPrice often continues in original directionPrice begins trending in the opposite directionHealthy part of a trend’s rhythmMarks the end of a trendTypically shallow, to a Fib/MA/structureOften deep, may break previous swing structureVolume often reduced after swing high if long or swing low if short.Volume often increased after swing high if long or visa versa.
Understanding Trend Exhaustion
Before any reversal occurs, the existing trend must show signs of exhaustion. This is the first phase of a potential turning point — and one of the most overlooked.
How Trend Exhaustion Looks on a Chart:
Climactic candles – multiple wide-range bars with expanding bodies.
Failed breakouts – price pushes through a level but fails to hold.
Volume spikes with no follow-through – smart money distributing or exiting.
Multiple tests of the same level – a sign that the trend is running out of energy.
The Anatomy of a High-Probability Reversal
A strong reversal setup typically has three key factors that can be supportive of a of follow-through.
1. Location – Price at a Key Zone
Major support/resistance level honoured
Prior swing highs or lows at a similar price point
Higher timeframe structure – I,e, agreement on a 4 hourly chart as well as an hourly.
In simple terms, if the price isn’t at a meaningful location, a meaningful reversal is less likely to occur.
2. Previous Signs of Trend Exhaustion
We have covered this above, with evidence that the current trend has now weakened, and there is some justification to prepare to enter a counter-trend.
3. Structural Confirmation
This is the trading trigger you are looking for as a potential signal for entry. Structural confirmation transforms an idea (“the price might reverse”) into an actual setup (“the reversal is underway”).Look for the following four signs:
Trendline or key short-term moving average breached
Lower highs and lower lows in an uptrend or higher lows in a downtrend
Confirmation that a key swing point has been honoured
Evidence that a retest and rejection of the broken structure has occurred.
This shows that momentum has not just stalled, it has now shifted.
Context Filters
Reversals are more likely to succeed when conditions are supported by other factors. This is to do with the identification of a strong market context where reversals are more likely to happen. These may include:
Time of day: The open of London or US sessions, or into session close when there may be some profit taking on a previously strong move
Volatility extremes: Price has expanded beyond its normal daily range (ATR-based or visually evidenced on a chart)
Market sentiment: Everyone is already long at the top or short at the bottom — setting up for a squeeze
Catalysts: Reactions to news, or data, that may cause a significant one-sided move
Adding context could make the difference between a technically correct trade and one that may offer a higher probability of going in your desired direction.
Recognising Common Reversal Patterns
There are classic chart patterns that may help visually reinforce the principles. They reflect exhaustion, rejection, and structural change, and may encourage many traders to follow the move, adding extra momentum to any initial move. PatternSignal TypeKey ClueConfirmation NeededDouble Top/BottomReversal StructureRepeated rejection of key levelBreak of swing low/high between peaksHead & ShouldersMomentum FailureFailed retest after strong pushNeckline breakPin BarExhaustion CandleSharp rejection with long wickOpposite-direction close after the pinEngulfingSudden Power ShiftOne candle overtakes previous rangeFollow-through candleRounding Top/BottomSlow Institutional TurnGradual stalling and reversalNeckline break of curveBreak of Structure (BoS)Structural ConfirmationNew higher low/lower high, support breakRetest and failure to reclaim broken level⚠️ These patterns should not be traded in isolation. Use them with context and only after signs of exhaustion and structure shifts.
FOUR Trader Reversal Traps to Avoid
Even with a solid framework, it’s easy to fall into common traps:
Trying to pick the exact top or bottom - Wait for price to prove the turn, don’t anticipate and enter early
Entering against the higher timeframe trend – Zooming out and checking alignment with higher timeframes may be prudent to reduce the likelihood of having to fight momentum on larger timeframes.
Trading every reversal signal - Not all signals are valid or particularly strong. Look for the confluence of multiple factors covered earlier, not just the presence of a pattern.
Letting bias override evidence - Just because you want a reversal to happen, it NEVER means it is there unless backed up by evidence.
Don’t Forget the Full Trading Story
A great setup means nothing without excellent execution. These ESSENTIAL facts are critical as with any trade, but there will never be an apology for reinforcing these.
Patience and execution discipline
Wait for your full criteria to be met. Avoid “almost” setups that feel tempting but don’t fully align with your full plan criteria. Likewise, when all your boxes are ticked, then take action.
Exit strategy
Use a mix of targets, structure-based trails, or scaling out, and know in advance how you’ll manage the trade once it starts moving.High-probability entries are only one part of a winning trade. Exit efficiently or you’ll waste great entry setups because of poor execution. There are many traders in this position; make sure you are not one of them.
Summary
High-probability reversals are not about being right at the top or bottom when you enter; this is rarely possible and adds additional risk without confirmation. They are about recognising and being ready when the trend is potentially changing, and taking action when:
Price is at a key level
The current trend shows clear signs of exhaustion
Structure confirms the shift
And context supports the move
Trade the evidence and your plan, not just what you think is likely to happen. Be patient, be ready, and when the setup is there, execute your trade with confidence.
SAAS(SoftwareAs A Service) 多年来一直依靠人头费这种简单有效的商业模式取得了盈利和估值上的双收，从底层逻辑来看，当企业业务增长势必带来员工规模的扩大，而软件服务行业多年来通过订阅模式将企业的拓张红利吃的死死的，在商业模型上SAAS企业为一个新的员工开设软件服务账号的边际成本基本为零，这也是相关产业多年来长期高速增长的基石。
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