Slippage tails on GBPJPY: histogram from my deals

[LondonScalper]

Slippage tails on GBPJPY: histogram from my deals

GBPJPY can look like free range until you histogram slippage. I pulled a few hundred discretionary scalps and plotted signed slippage in points. The centre of the distribution was boring; the right-hand tail was where quiet weeks died.

Desk response after seeing the shape:

• Harder spread filter before entry on GBPJPY than on EURUSD.
• Smaller size when Asia is already wild or when London opens into a messy overnight range.
• Time-stop enforced — tails love traders who “give it room” without a clock.

Averages lie; tails bill you. If your cross feels “fine on average,” check whether a few disasters are funding the marketing story in your head.

If you have charted slippage on a volatile cross, did the histogram change your size, your session hours, or whether you trade that name at all?

I revisit the histogram quarterly. If the tail thickens, I do not “try harder” on GBPJPY — I shrink size or shorten the hours I allow that cross. Tools change; humility stays.

[PropScalpDesk]

Worth splitting that histogram by order type if you haven't already. On my own crosses, entries by market order had a fairly tight distribution. Almost all of the ugly tail came from stop-loss exits, which makes sense, since a stop fills exactly when liquidity is disappearing. If the tail lives in the stops, the fix is mostly smaller size or avoiding certain hours. A tighter entry filter won't touch it.

The shape around zero also tells you something about the broker. A fair venue should show some positive slippage as well as negative. If the left side of your distribution is almost empty while the right side has a proper tail, positive slippage probably isn't being passed on, and that's a question for the broker rather than for your strategy.

I'd also plot it in R instead of points. A 12-point slip is nothing on a wide swing stop and a big bite out of a 60-point scalp.