If we flatbet one dollar, bet EC , or whatever,
and then the win loss result make into a chart,
we may see the dollar line moving ..
1] zig-zag along the 'zero' chart line.
2]zigzag higher, and higher, to the north positive territory.
3]zigzag lower, and lower, to the south negative territory.
4]moving in huge zig zag, from south to north, and back to south, and alternating...
Thus using the LINE as a "Follow the trend", we could risk the deviation, by following the advantage side, hoping the initial losses will be offset by "huge deviation", that we hope to happen.
It just like betting the futures market, where we long and short the price , by following the trend.
When the line move into northern side , we bet the northern side will higher,
cut loss when it move lower into southern side, and bet the line will move lower and lower into the southern side.
We lose HUGE when the line keep zig zagging up and down the zero line, where the accumulated "cut losses", become too large, and unable to offset by any winning of deviation, that may followed.