price - цена
amount - обьем ордеров

askBidDifference - разница в обьеме между ask и bid по индексу в массиве

maxOrderAmount максимальный обьем находим в стаканах ask и bid


// вывод элемента таблици ask bid
-(void)orderPrice:(double)price amount:(double)amount askBidDifference:(double)askBidDifference maxOrderAmount:(double)maxOrderAmount isBid:(BOOL)isBid{

// ........ тут вывод текста цена обьем я убрал чтоб не мешало


    // color2
    if (askBidDifference == 0) {
        if (isBid) {
            askBidDifference = 0.01f;
        } else {
            askBidDifference = -0.01f;
        }
    }
    float color2 = (float) (fabs(askBidDifference) / maxOrderAmount);
    //.8 = 1
    color2 = color2 / 100.0f * 80.0f;

    // color
    askBidDifference = amount;
    if (askBidDifference == 0) {
        if (isBid) {
            askBidDifference = 0.01f;
        } else {
            askBidDifference = -0.01f;
        }
    }
    float color = (float) (fabs(askBidDifference) / maxOrderAmount);
    //.8 = 1
    color = color / 100.0f * 80.0f;

    color = (color + color2) / 2.0f;

    if (color+0.2f > 0.5f) {
        self.tf_order.textColor = [NSColor blackColor];
        self.tf_price.textColor = [NSColor blackColor];
    } else {
        self.tf_order.textColor = [NSColor whiteColor];
        self.tf_price.textColor = [NSColor whiteColor];
    }
    if (askBidDifference > 0) {
        self.tf_order.backgroundColor = [NSColor colorWithRed:0 green:0.2f + color blue:0 alpha:1];
        self.tf_price.backgroundColor = [NSColor colorWithRed:0 green:0.2f + color blue:0 alpha:1];
    }
    if (askBidDifference < 0) {
        self.tf_order.backgroundColor = [NSColor colorWithRed:0.2f + color green:0 blue:0 alpha:1];
        self.tf_price.backgroundColor = [NSColor colorWithRed:0.2f + color green:0 blue:0 alpha:1];
    }
}