In simple terms
Adding to a winner means increasing a long position after price has risen. The technical language is often pyramiding or scaling in as the position moves favorably.
Example: one unit at 100 and a second at 120 raise average entry to 110. The first trade is profitable, but quantity and capital exposure are now larger.
How it is controlled
The plan should define the signal for each addition, tranche size, maximum number of entries, and stop for the combined position. After adding, risk must be recalculated from the new average. Moving the stop may protect part of the result, but it may also increase the chance of an exit.
Unlike averaging down, the trader adds after favorable movement; this does not remove gap, slippage, or reversal risk.
Limit
An existing profit does not make the new quantity safe. If the addition is too large or too late, a small reversal may erase the earlier gain and turn the combined trade into a loss.
Sources
- CME Group, Proper Position Size — ties quantity to per-trade risk and stop distance.
- CME Group, Trading Strategies in Your Trade Plan — calls for advance criteria for entry, management, and exit.
- CME Group, Position and Risk Management — explains that more contracts increase exposure and require suitable risk scenarios.