I found these in mlv_rec.c

` for(int32_t k = 0; k < scale; k++)`

{

draw_line(x, y+5, x, y+17, color);

x++;

}

` if (prev_x && (prev_x < x))`

{

if(prev_fill_y)

{

draw_line(prev_x, prev_fill_y, x, y_fill, COLOR_GREEN1);

}

if(prev_rate_0_y && y_rate_0 != ymax)

{

draw_line(prev_x, prev_rate_0_y, x, y_rate_0, COLOR_RED);

}

if(card_spanning && prev_rate_1_y && y_rate_1 != ymax)

{

draw_line(prev_x, prev_rate_1_y, x, y_rate_1, COLOR_BLUE);

}

}

Hope it helps.