Mastering Position Size and Hold Times

by Roger Scott | Apr 23, 2026

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Here’s a question I get all the time: How do you trade when the market isn’t moving in the same direction as the position you want to take?

This isn’t about whether you should buy a stock or not — that’s basic stuff. This is about how you adjust your position size and hold time based on what the market’s actually doing. Because if you’re not aligning your trades with market direction, you’re setting yourself up for unnecessary losses.

Let me break down the framework I use. It works across any time frame — whether you’re trading 5-minute scalps or weekly charts. The key is alignment…

If you’re looking at a 15-minute market, you’re looking at a 15-minute chart for your stock. If it’s weekly, then it’s weekly for both. They have to be in sync. And keep in mind that market aggression matters just as much as direction.

When neither the market nor the stock is aggressive, you won’t see powerful follow-through. If both were aggressive, you’d see similar price action but with volatility whipping up and down. Understanding that difference helps you avoid confusing a lack of momentum for a lack of opportunity.

There’s another layer here that traders miss: Fair value tends to act like a magnet. When you look at where most price action clusters, that area often aligns with something similar to a five-day VWAP. Markets are naturally drawn back toward that level, which is why recognizing it can help you understand whether a move has real strength behind it or if it’s likely to mean-revert.

The Framework for Long Positions

Let’s start with bullish trades. If the market’s going up and your position is bullish, go full size with a full hold time. This is when everything’s working in your favor — the market’s got your back, so you can take your normal position and hold for your standard timeframe.

Now, if the market’s going sideways and you want to go long, cut it in half — half size and part-time hold. The market’s choppy so you’re not getting the same tailwind. Reduce both your position size and how long you plan to stay in the trade.

Here’s where it gets really conservative: If the market’s going down and you still want to go long, you’re looking at quarter order size and a short hold time. You’re fighting the current here so you dramatically reduce your exposure on both fronts.

Maybe you’ve got a strong uptrend in the stock but if the market’s moving against you, you can’t ignore that.

The Framework for Short Positions

The same logic applies when you’re shorting. If the market’s going down and you have a short position, go full size with a full hold time. You’re aligned with the market’s momentum so you can trade with conviction.

When the market’s going sideways and you want to go short, it’s half size with a part-time hold. Again, you’re dealing with chop so you scale back your risk accordingly.

And if the market’s going up and you want to take a short position, you’re looking at quarter order size and a short hold time. This is the most aggressive mismatch so you need to be extra cautious with both your size and your time in the trade.

Here’s the thing: We’re trading proxies of the market. Your stock doesn’t exist in a vacuum. If the market’s going up strong and climbing, you should probably stay in your positions longer.

But if the market’s choppy or moving against you, you need to adjust. And remember, the broader economic environment plays a role too. Some traders assume the economy’s always weakening, but in many areas it’s actually showing improvement. Those shifts flow into weekly price data, which tends to assimilate fundamental changes more smoothly.

This framework isn’t about changing which stocks you trade — it’s about changing how you trade them based on what the market’s doing. You can’t just trade the stock. You have to trade the stock based on what the market’s doing.

Weekly price data and the economy move together pretty well. The weekly data assimilates slow enough where it can incorporate meaningful changes in economic conditions. So if you’re trading weekly charts, the economy’s actually going to be the driver behind those moves.

I hope that helps!

Roger Scott
Roger Scott Trading

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