When the fund rises to a certain height and expectation, the position can be appropriately reduced. Wait until the value of the fund is adjusted back to a lower value than when lightening the position, so that the difference is earned and the cost is low.

Another is that the fund has been falling, even falling to negative returns, that is, losing money. At this time, the more you make up the position, the more you make up, and the cost will gradually decrease.

As can be seen from this figure, the stock market is rising in a curve, falling seriously for a period of time, rising rapidly for a period of time, and rising and falling slightly for a period of time. If you can sell at a higher price and buy at a lower price, the cost will naturally be low.

But the high and low points are actually difficult to control. Therefore, we can only lighten positions in batches at high points and increase positions in batches at low points.