If we wanna trade pyramiding techniques, I think it's best we really understand the price action to the call, because a trader that can't read the chart well will find the difficult, because the market can be full of surprises.

A pyramiding techniques is all about adding to the more trade to tell winning ones with the same lot Size.
For example if we bought gbpusd at 1.2356 and the price shoot up from their and try to retrace a bit at 1.2380 down to 1.2320. And on our chart if the price looks like it going to hold it their we can place another buy trade with the same lot size while setting our stop loss in such a way that half of the initial winning trade will still be intact.

Pyramid trading is good but it also has some downside, after all there is no 100% perfect strategy.